diff --git a/.gitattributes b/.gitattributes index bed0738c7eeb449bca98b5d2f33c89a1ee56349a..9e68e5ec585e0489161b758c2190064ae19dc411 100644 --- a/.gitattributes +++ b/.gitattributes @@ -58,3 +58,8 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text # Video files - compressed *.mp4 filter=lfs diff=lfs merge=lfs -text *.webm filter=lfs diff=lfs merge=lfs -text +Goods/Props/Chair/SM_Chair3/SM_Chair3.usd filter=lfs diff=lfs merge=lfs -text +Goods/Props/Chair/VP_Coffee_Chair_LOD0/VP_Coffee_Chair_LOD0.usd filter=lfs diff=lfs merge=lfs -text +Goods/Props/Chair/SM_BenchChair/SM_BenchChair.usd filter=lfs diff=lfs merge=lfs -text +Goods/Props/Chair/SM_PlasticChair/SM_PlasticChair.usd filter=lfs diff=lfs merge=lfs -text +Goods/Props/Chair/SM_Chair2/SM_Chair2.usd filter=lfs diff=lfs merge=lfs -text diff --git a/Goods/Props/Alcohol/SM_Alc_01/INST_Alch.mdl b/Goods/Props/Alcohol/SM_Alc_01/INST_Alch.mdl new file mode 100644 index 0000000000000000000000000000000000000000..c9011508658a6d1cb613b7053962dc0930aee041 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Alc_01/INST_Alch.mdl @@ -0,0 +1,74 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material INST_Alch( + uniform texture_2d Param_2 = texture_2d("./INST_Alch/T_Alch_N.png",::tex::gamma_linear) + [[ + anno::display_name("Param_2"), + anno::ui_order(32), + sampler_normal() + ]], + uniform texture_2d Param = texture_2d("./INST_Alch/T_Alch_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Param"), + anno::ui_order(32), + sampler_color() + ]], + uniform texture_2d Param_1 = texture_2d("./INST_Alch/T_Alch_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("Param_1"), + anno::ui_order(32), + sampler_color() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Param_2,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(Param,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(Param_1,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.z; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: true); diff --git a/Goods/Props/Alcohol/SM_Alc_01/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Alc_01/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Alc_01/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Alc_01/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Alc_01/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Alc_01/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Alc_01/SM_Alc_01.usd b/Goods/Props/Alcohol/SM_Alc_01/SM_Alc_01.usd new file mode 100644 index 0000000000000000000000000000000000000000..4ebb35ae92b0290efa7599a4107a94f238eb0b36 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Alc_01/SM_Alc_01.usd differ diff --git a/Goods/Props/Alcohol/SM_Alc_02/INST_Alch.mdl b/Goods/Props/Alcohol/SM_Alc_02/INST_Alch.mdl new file mode 100644 index 0000000000000000000000000000000000000000..c9011508658a6d1cb613b7053962dc0930aee041 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Alc_02/INST_Alch.mdl @@ -0,0 +1,74 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material INST_Alch( + uniform texture_2d Param_2 = texture_2d("./INST_Alch/T_Alch_N.png",::tex::gamma_linear) + [[ + anno::display_name("Param_2"), + anno::ui_order(32), + sampler_normal() + ]], + uniform texture_2d Param = texture_2d("./INST_Alch/T_Alch_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Param"), + anno::ui_order(32), + sampler_color() + ]], + uniform texture_2d Param_1 = texture_2d("./INST_Alch/T_Alch_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("Param_1"), + anno::ui_order(32), + sampler_color() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Param_2,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(Param,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(Param_1,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.z; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: true); diff --git a/Goods/Props/Alcohol/SM_Alc_02/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Alc_02/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Alc_02/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Alc_02/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Alc_02/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Alc_02/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Alc_02/SM_Alc_02.usd b/Goods/Props/Alcohol/SM_Alc_02/SM_Alc_02.usd new file mode 100644 index 0000000000000000000000000000000000000000..fea953161025d078b6a05adbe516ac0ede25dd23 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Alc_02/SM_Alc_02.usd differ diff --git a/Goods/Props/Alcohol/SM_Alc_03/INST_Alch.mdl b/Goods/Props/Alcohol/SM_Alc_03/INST_Alch.mdl new file mode 100644 index 0000000000000000000000000000000000000000..c9011508658a6d1cb613b7053962dc0930aee041 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Alc_03/INST_Alch.mdl @@ -0,0 +1,74 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material INST_Alch( + uniform texture_2d Param_2 = texture_2d("./INST_Alch/T_Alch_N.png",::tex::gamma_linear) + [[ + anno::display_name("Param_2"), + anno::ui_order(32), + sampler_normal() + ]], + uniform texture_2d Param = texture_2d("./INST_Alch/T_Alch_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Param"), + anno::ui_order(32), + sampler_color() + ]], + uniform texture_2d Param_1 = texture_2d("./INST_Alch/T_Alch_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("Param_1"), + anno::ui_order(32), + sampler_color() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Param_2,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(Param,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(Param_1,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.z; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: true); diff --git a/Goods/Props/Alcohol/SM_Alc_03/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Alc_03/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Alc_03/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Alc_03/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Alc_03/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Alc_03/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Alc_03/SM_Alc_03.usd b/Goods/Props/Alcohol/SM_Alc_03/SM_Alc_03.usd new file mode 100644 index 0000000000000000000000000000000000000000..8c799226af64bdcd3137038c2392ea71e527710b Binary files /dev/null and b/Goods/Props/Alcohol/SM_Alc_03/SM_Alc_03.usd differ diff --git a/Goods/Props/Alcohol/SM_Alc_04/INST_Alch.mdl b/Goods/Props/Alcohol/SM_Alc_04/INST_Alch.mdl new file mode 100644 index 0000000000000000000000000000000000000000..c9011508658a6d1cb613b7053962dc0930aee041 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Alc_04/INST_Alch.mdl @@ -0,0 +1,74 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material INST_Alch( + uniform texture_2d Param_2 = texture_2d("./INST_Alch/T_Alch_N.png",::tex::gamma_linear) + [[ + anno::display_name("Param_2"), + anno::ui_order(32), + sampler_normal() + ]], + uniform texture_2d Param = texture_2d("./INST_Alch/T_Alch_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Param"), + anno::ui_order(32), + sampler_color() + ]], + uniform texture_2d Param_1 = texture_2d("./INST_Alch/T_Alch_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("Param_1"), + anno::ui_order(32), + sampler_color() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Param_2,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(Param,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(Param_1,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.z; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: true); diff --git a/Goods/Props/Alcohol/SM_Alc_04/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Alc_04/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Alc_04/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Alc_04/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Alc_04/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Alc_04/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Alc_04/SM_Alc_04.usd b/Goods/Props/Alcohol/SM_Alc_04/SM_Alc_04.usd new file mode 100644 index 0000000000000000000000000000000000000000..546b5fc6e1051cb5c648913c3e4ab670721edb5d Binary files /dev/null and b/Goods/Props/Alcohol/SM_Alc_04/SM_Alc_04.usd differ diff --git a/Goods/Props/Alcohol/SM_Alc_05/INST_Alch.mdl b/Goods/Props/Alcohol/SM_Alc_05/INST_Alch.mdl new file mode 100644 index 0000000000000000000000000000000000000000..c9011508658a6d1cb613b7053962dc0930aee041 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Alc_05/INST_Alch.mdl @@ -0,0 +1,74 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material INST_Alch( + uniform texture_2d Param_2 = texture_2d("./INST_Alch/T_Alch_N.png",::tex::gamma_linear) + [[ + anno::display_name("Param_2"), + anno::ui_order(32), + sampler_normal() + ]], + uniform texture_2d Param = texture_2d("./INST_Alch/T_Alch_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Param"), + anno::ui_order(32), + sampler_color() + ]], + uniform texture_2d Param_1 = texture_2d("./INST_Alch/T_Alch_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("Param_1"), + anno::ui_order(32), + sampler_color() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Param_2,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(Param,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(Param_1,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.z; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: true); diff --git a/Goods/Props/Alcohol/SM_Alc_05/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Alc_05/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Alc_05/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Alc_05/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Alc_05/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Alc_05/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Alc_05/SM_Alc_05.usd b/Goods/Props/Alcohol/SM_Alc_05/SM_Alc_05.usd new file mode 100644 index 0000000000000000000000000000000000000000..d6d5dee9a1328409369d781eb22c113e073b8bc1 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Alc_05/SM_Alc_05.usd differ diff --git a/Goods/Props/Alcohol/SM_Beer/M_Grocery1.mdl b/Goods/Props/Alcohol/SM_Beer/M_Grocery1.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a8b4979d4daa3e0b75185a96cdf225a104287696 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer/M_Grocery1.mdl @@ -0,0 +1,60 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Grocery1( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_Grocery1/T_Grocery1_Normal_OpenGL.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_Grocery1/T_Grocery1_Base_Color.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_Grocery1/T_Grocery1_Metallic.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local3 = tex::lookup_float4(texture_2d("./M_Grocery1/T_Grocery1_Opacity.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (float3(Local3.x,Local3.y,Local3.z).x - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = float3(Local2.x,Local2.y,Local2.z).x; + float Specular_mdl = 0.5; + float Roughness_mdl = 0.5; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Beer/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Beer/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Beer/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Beer/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Beer/SM_Beer.usd b/Goods/Props/Alcohol/SM_Beer/SM_Beer.usd new file mode 100644 index 0000000000000000000000000000000000000000..a0547f3fc6f0ece618767c452730cdc54dc11f85 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Beer/SM_Beer.usd differ diff --git a/Goods/Props/Alcohol/SM_Beer_1/M_Beer_Clean.mdl b/Goods/Props/Alcohol/SM_Beer_1/M_Beer_Clean.mdl new file mode 100644 index 0000000000000000000000000000000000000000..df78295c42d1898bd832e0cdd2baf2869ab62a4e --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer_1/M_Beer_Clean.mdl @@ -0,0 +1,56 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Beer_Clean( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_Beer_Clean/T_Beer_Clean_4K_N.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_Beer_Clean/T_Beer_Clean_4K_D.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_Beer_Clean/T_Beer_Clean_4K_M.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Beer_1/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Beer_1/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer_1/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Beer_1/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Beer_1/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer_1/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Beer_1/SM_Beer_1.usd b/Goods/Props/Alcohol/SM_Beer_1/SM_Beer_1.usd new file mode 100644 index 0000000000000000000000000000000000000000..da108c8be4a53450e401f419f15b025d769016ce Binary files /dev/null and b/Goods/Props/Alcohol/SM_Beer_1/SM_Beer_1.usd differ diff --git a/Goods/Props/Alcohol/SM_Beer_2/M_Beer_Clean.mdl b/Goods/Props/Alcohol/SM_Beer_2/M_Beer_Clean.mdl new file mode 100644 index 0000000000000000000000000000000000000000..df78295c42d1898bd832e0cdd2baf2869ab62a4e --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer_2/M_Beer_Clean.mdl @@ -0,0 +1,56 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Beer_Clean( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_Beer_Clean/T_Beer_Clean_4K_N.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_Beer_Clean/T_Beer_Clean_4K_D.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_Beer_Clean/T_Beer_Clean_4K_M.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Beer_2/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Beer_2/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer_2/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Beer_2/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Beer_2/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer_2/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Beer_2/SM_Beer_2.usd b/Goods/Props/Alcohol/SM_Beer_2/SM_Beer_2.usd new file mode 100644 index 0000000000000000000000000000000000000000..55f125563c87cbacb9c2edd35b9dfc1411ca315c Binary files /dev/null and b/Goods/Props/Alcohol/SM_Beer_2/SM_Beer_2.usd differ diff --git a/Goods/Props/Alcohol/SM_Beer_3/M_Beer_Clean.mdl b/Goods/Props/Alcohol/SM_Beer_3/M_Beer_Clean.mdl new file mode 100644 index 0000000000000000000000000000000000000000..df78295c42d1898bd832e0cdd2baf2869ab62a4e --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer_3/M_Beer_Clean.mdl @@ -0,0 +1,56 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Beer_Clean( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_Beer_Clean/T_Beer_Clean_4K_N.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_Beer_Clean/T_Beer_Clean_4K_D.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_Beer_Clean/T_Beer_Clean_4K_M.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Beer_3/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Beer_3/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer_3/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Beer_3/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Beer_3/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer_3/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Beer_3/SM_Beer_3.usd b/Goods/Props/Alcohol/SM_Beer_3/SM_Beer_3.usd new file mode 100644 index 0000000000000000000000000000000000000000..996f38ead759ff62ebf50041e525d86a0d5faa5a Binary files /dev/null and b/Goods/Props/Alcohol/SM_Beer_3/SM_Beer_3.usd differ diff --git a/Goods/Props/Alcohol/SM_Beer_4/M_Beer_Clean.mdl b/Goods/Props/Alcohol/SM_Beer_4/M_Beer_Clean.mdl new file mode 100644 index 0000000000000000000000000000000000000000..df78295c42d1898bd832e0cdd2baf2869ab62a4e --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer_4/M_Beer_Clean.mdl @@ -0,0 +1,56 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Beer_Clean( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_Beer_Clean/T_Beer_Clean_4K_N.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_Beer_Clean/T_Beer_Clean_4K_D.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_Beer_Clean/T_Beer_Clean_4K_M.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Beer_4/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Beer_4/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer_4/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Beer_4/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Beer_4/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer_4/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Beer_4/SM_Beer_4.usd b/Goods/Props/Alcohol/SM_Beer_4/SM_Beer_4.usd new file mode 100644 index 0000000000000000000000000000000000000000..a7e2c61bf1c6887e127a74e7217a9c0cb0a07d98 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Beer_4/SM_Beer_4.usd differ diff --git a/Goods/Props/Alcohol/SM_Beer_5/M_Beer_Clean.mdl b/Goods/Props/Alcohol/SM_Beer_5/M_Beer_Clean.mdl new file mode 100644 index 0000000000000000000000000000000000000000..df78295c42d1898bd832e0cdd2baf2869ab62a4e --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer_5/M_Beer_Clean.mdl @@ -0,0 +1,56 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Beer_Clean( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_Beer_Clean/T_Beer_Clean_4K_N.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_Beer_Clean/T_Beer_Clean_4K_D.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_Beer_Clean/T_Beer_Clean_4K_M.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Beer_5/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Beer_5/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer_5/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Beer_5/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Beer_5/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer_5/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Beer_5/SM_Beer_5.usd b/Goods/Props/Alcohol/SM_Beer_5/SM_Beer_5.usd new file mode 100644 index 0000000000000000000000000000000000000000..d0348ae01d244c977a1562de73944f17d8020ebe Binary files /dev/null and b/Goods/Props/Alcohol/SM_Beer_5/SM_Beer_5.usd differ diff --git a/Goods/Props/Alcohol/SM_Beer_6/M_Beer_Clean.mdl b/Goods/Props/Alcohol/SM_Beer_6/M_Beer_Clean.mdl new file mode 100644 index 0000000000000000000000000000000000000000..df78295c42d1898bd832e0cdd2baf2869ab62a4e --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer_6/M_Beer_Clean.mdl @@ -0,0 +1,56 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Beer_Clean( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_Beer_Clean/T_Beer_Clean_4K_N.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_Beer_Clean/T_Beer_Clean_4K_D.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_Beer_Clean/T_Beer_Clean_4K_M.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Beer_6/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Beer_6/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer_6/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Beer_6/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Beer_6/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer_6/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Beer_6/SM_Beer_6.usd b/Goods/Props/Alcohol/SM_Beer_6/SM_Beer_6.usd new file mode 100644 index 0000000000000000000000000000000000000000..09f2ff6cdcb3acf7b1cd41947a9d0718e067b5d5 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Beer_6/SM_Beer_6.usd differ diff --git a/Goods/Props/Alcohol/SM_Beer_7/M_Beer_Clean.mdl b/Goods/Props/Alcohol/SM_Beer_7/M_Beer_Clean.mdl new file mode 100644 index 0000000000000000000000000000000000000000..df78295c42d1898bd832e0cdd2baf2869ab62a4e --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer_7/M_Beer_Clean.mdl @@ -0,0 +1,56 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Beer_Clean( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_Beer_Clean/T_Beer_Clean_4K_N.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_Beer_Clean/T_Beer_Clean_4K_D.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_Beer_Clean/T_Beer_Clean_4K_M.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Beer_7/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Beer_7/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer_7/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Beer_7/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Beer_7/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beer_7/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Beer_7/SM_Beer_7.usd b/Goods/Props/Alcohol/SM_Beer_7/SM_Beer_7.usd new file mode 100644 index 0000000000000000000000000000000000000000..a709fed1d4175b48f2dd33b35b7d9196b587890e Binary files /dev/null and b/Goods/Props/Alcohol/SM_Beer_7/SM_Beer_7.usd differ diff --git a/Goods/Props/Alcohol/SM_Beers_NN_01a/MI_Beers_NN_01a.mdl b/Goods/Props/Alcohol/SM_Beers_NN_01a/MI_Beers_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..13c561a3872c910b6806791440a41597761bee16 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beers_NN_01a/MI_Beers_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Beers_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Beers_NN_01a/TX_Beers_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Beers_NN_01a/TX_Beers_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Beers_NN_01a/TX_Beers_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Beers_NN_01a/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Beers_NN_01a/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beers_NN_01a/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Beers_NN_01a/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Beers_NN_01a/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beers_NN_01a/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Beers_NN_01d/MI_Beers_NN_01a.mdl b/Goods/Props/Alcohol/SM_Beers_NN_01d/MI_Beers_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..13c561a3872c910b6806791440a41597761bee16 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beers_NN_01d/MI_Beers_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Beers_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Beers_NN_01a/TX_Beers_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Beers_NN_01a/TX_Beers_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Beers_NN_01a/TX_Beers_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Beers_NN_01d/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Beers_NN_01d/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beers_NN_01d/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Beers_NN_01d/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Beers_NN_01d/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Beers_NN_01d/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_BigWater/M_Bottle_Clean.mdl b/Goods/Props/Alcohol/SM_Bottle_BigWater/M_Bottle_Clean.mdl new file mode 100644 index 0000000000000000000000000000000000000000..3dd679a43cdaab1fb9c27c72645b85aab523c482 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_BigWater/M_Bottle_Clean.mdl @@ -0,0 +1,59 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Bottle_Clean( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_N.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_D.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_M.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local1.w - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_BigWater/M_Bottle_Glass_Base.mdl b/Goods/Props/Alcohol/SM_Bottle_BigWater/M_Bottle_Glass_Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..f310c4815f4f68509617c78d3f77f4070fdf8f8b --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_BigWater/M_Bottle_Glass_Base.mdl @@ -0,0 +1,115 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Translucent import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Bottle_Glass_Base( + uniform texture_2d Normal = texture_2d("./M_Bottle_Glass_Base/T_Bottle_Clean_4K_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Base_Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Base_Color"), + anno::ui_order(32) + ]], + float Metallic_Min = 0.8 + [[ + anno::display_name("Metallic_Min"), + anno::ui_order(32) + ]], + float Metallic_Max = 1.0 + [[ + anno::display_name("Metallic_Max"), + anno::ui_order(32) + ]], + float Roughness_Min = 0.2 + [[ + anno::display_name("Roughness_Min"), + anno::ui_order(32) + ]], + float Roughness_Max = 0.0 + [[ + anno::display_name("Roughness_Max"), + anno::ui_order(32) + ]], + float Opacity_Min = 0.2 + [[ + anno::display_name("Opacity_Min"), + anno::ui_order(32) + ]], + float Opacity_Max = 0.35 + [[ + anno::display_name("Opacity_Max"), + anno::ui_order(32) + ]], + float Liquid_Offset = 0.0 + [[ + anno::display_name("Liquid_Offset"), + anno::ui_order(32) + ]], + uniform float Refraction_Max = 1.5 + [[ + anno::display_name("Refraction_Max"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 Local5 = (::vertex_normal_world_space(true) * Liquid_Offset); + + float3 WorldPositionOffset_mdl = Local5; + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = ::fresnel(5.0, 0.04, ::pixel_normal_world_space(true)); + float Local2 = math::lerp(Metallic_Min,Metallic_Max,Local1); + float Local3 = math::lerp(Roughness_Min,Roughness_Max,Local1); + float Local4 = math::lerp(Opacity_Min,Opacity_Max,Local1); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float Opacity_mdl = Local4; + float OpacityMask_mdl = (math::saturate(Local4) - 1.0f / 255.0f) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = float3(Base_Color.x,Base_Color.y,Base_Color.z); + float Metallic_mdl = Local2; + float Specular_mdl = 0.5; + float Roughness_mdl = Local3; + float3 Refraction_mdl = math::max(float3(Refraction_Max,Refraction_Max,Refraction_Max), 1.0f); + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Translucent( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: Opacity_mdl, + opacity_mask: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + refraction: Refraction_mdl.x, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_BigWater/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_BigWater/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_BigWater/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_BigWater/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_BigWater/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_BigWater/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_BigWater/OmniUe4Translucent.mdl b/Goods/Props/Alcohol/SM_Bottle_BigWater/OmniUe4Translucent.mdl new file mode 100644 index 0000000000000000000000000000000000000000..483a83004b8f7d5bf820a7905d06ea2d7d5894af --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_BigWater/OmniUe4Translucent.mdl @@ -0,0 +1,233 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - Emissive color affected by opacity +// - Support opacity mask +//* 1.0.2 - Unlit translucent +//* 1.0.3 - specular bsdf instead of microfacet ggx smith bsdf +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +color get_translucent_tint(color base_color, float opacity) +[[ + anno::description("base color of UE4 translucent"), + anno::noinline() +]] +{ + return math::lerp(color(1.0), base_color, opacity); +} + +// Just for UE4 distilling +float get_translucent_opacity(float opacity) +[[ + anno::noinline() +]] +{ + return opacity; +} + +color get_emissive_intensity(color emissive, float opacity) +[[ + anno::description("emissive color of UE4 translucent"), + anno::noinline() +]] +{ + return emissive * opacity; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - + tangent_v * normal.y + /* flip_tangent_v */ + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Translucent( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float opacity_mask = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform float refraction = 1.0, + uniform bool two_sided = false, + uniform bool is_tangent_space_normal = true, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Translucent"), + anno::description("Omni UE4 Translucent, supports UE4 Translucent shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "translucent")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::min(math::max(metallic, 0.0f), 0.99f); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_opacity = math::saturate(opacity); + float3 final_normal = math::normalize(normal); + + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color)); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + bsdf frosted_bsdf = df::specular_bsdf( + tint: color(1), + mode: df::scatter_reflect_transmit + ); + + bsdf final_mix_bsdf = + is_unlit ? df::specular_bsdf( + tint: get_translucent_tint(base_color: final_base_color, opacity: final_opacity), + mode: df::scatter_reflect_transmit + ) + : df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: dielectric_metal_mix, + weight: get_translucent_opacity(final_opacity)), + df::bsdf_component( + component: frosted_bsdf, + weight: 1.0-get_translucent_opacity(final_opacity)) + ) + ); +} +in material( + thin_walled: two_sided, // Graphene? + ior: color(refraction), //refraction + surface: material_surface( + scattering: final_mix_bsdf, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: get_emissive_intensity(emissive: final_emissive_color, opacity: final_opacity) + ) + ), + + geometry: material_geometry( + displacement: displacement, + normal: the_normal, + cutout_opacity: enable_opacity ? opacity_mask : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Gin/M_Bottle_Clean.mdl b/Goods/Props/Alcohol/SM_Bottle_Gin/M_Bottle_Clean.mdl new file mode 100644 index 0000000000000000000000000000000000000000..3dd679a43cdaab1fb9c27c72645b85aab523c482 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Gin/M_Bottle_Clean.mdl @@ -0,0 +1,59 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Bottle_Clean( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_N.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_D.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_M.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local1.w - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Gin/M_Bottle_Glass_Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Gin/M_Bottle_Glass_Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..f310c4815f4f68509617c78d3f77f4070fdf8f8b --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Gin/M_Bottle_Glass_Base.mdl @@ -0,0 +1,115 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Translucent import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Bottle_Glass_Base( + uniform texture_2d Normal = texture_2d("./M_Bottle_Glass_Base/T_Bottle_Clean_4K_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Base_Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Base_Color"), + anno::ui_order(32) + ]], + float Metallic_Min = 0.8 + [[ + anno::display_name("Metallic_Min"), + anno::ui_order(32) + ]], + float Metallic_Max = 1.0 + [[ + anno::display_name("Metallic_Max"), + anno::ui_order(32) + ]], + float Roughness_Min = 0.2 + [[ + anno::display_name("Roughness_Min"), + anno::ui_order(32) + ]], + float Roughness_Max = 0.0 + [[ + anno::display_name("Roughness_Max"), + anno::ui_order(32) + ]], + float Opacity_Min = 0.2 + [[ + anno::display_name("Opacity_Min"), + anno::ui_order(32) + ]], + float Opacity_Max = 0.35 + [[ + anno::display_name("Opacity_Max"), + anno::ui_order(32) + ]], + float Liquid_Offset = 0.0 + [[ + anno::display_name("Liquid_Offset"), + anno::ui_order(32) + ]], + uniform float Refraction_Max = 1.5 + [[ + anno::display_name("Refraction_Max"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 Local5 = (::vertex_normal_world_space(true) * Liquid_Offset); + + float3 WorldPositionOffset_mdl = Local5; + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = ::fresnel(5.0, 0.04, ::pixel_normal_world_space(true)); + float Local2 = math::lerp(Metallic_Min,Metallic_Max,Local1); + float Local3 = math::lerp(Roughness_Min,Roughness_Max,Local1); + float Local4 = math::lerp(Opacity_Min,Opacity_Max,Local1); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float Opacity_mdl = Local4; + float OpacityMask_mdl = (math::saturate(Local4) - 1.0f / 255.0f) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = float3(Base_Color.x,Base_Color.y,Base_Color.z); + float Metallic_mdl = Local2; + float Specular_mdl = 0.5; + float Roughness_mdl = Local3; + float3 Refraction_mdl = math::max(float3(Refraction_Max,Refraction_Max,Refraction_Max), 1.0f); + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Translucent( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: Opacity_mdl, + opacity_mask: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + refraction: Refraction_mdl.x, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Gin/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Gin/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Gin/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Gin/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_Gin/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Gin/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_Gin/OmniUe4Translucent.mdl b/Goods/Props/Alcohol/SM_Bottle_Gin/OmniUe4Translucent.mdl new file mode 100644 index 0000000000000000000000000000000000000000..483a83004b8f7d5bf820a7905d06ea2d7d5894af --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Gin/OmniUe4Translucent.mdl @@ -0,0 +1,233 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - Emissive color affected by opacity +// - Support opacity mask +//* 1.0.2 - Unlit translucent +//* 1.0.3 - specular bsdf instead of microfacet ggx smith bsdf +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +color get_translucent_tint(color base_color, float opacity) +[[ + anno::description("base color of UE4 translucent"), + anno::noinline() +]] +{ + return math::lerp(color(1.0), base_color, opacity); +} + +// Just for UE4 distilling +float get_translucent_opacity(float opacity) +[[ + anno::noinline() +]] +{ + return opacity; +} + +color get_emissive_intensity(color emissive, float opacity) +[[ + anno::description("emissive color of UE4 translucent"), + anno::noinline() +]] +{ + return emissive * opacity; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - + tangent_v * normal.y + /* flip_tangent_v */ + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Translucent( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float opacity_mask = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform float refraction = 1.0, + uniform bool two_sided = false, + uniform bool is_tangent_space_normal = true, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Translucent"), + anno::description("Omni UE4 Translucent, supports UE4 Translucent shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "translucent")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::min(math::max(metallic, 0.0f), 0.99f); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_opacity = math::saturate(opacity); + float3 final_normal = math::normalize(normal); + + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color)); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + bsdf frosted_bsdf = df::specular_bsdf( + tint: color(1), + mode: df::scatter_reflect_transmit + ); + + bsdf final_mix_bsdf = + is_unlit ? df::specular_bsdf( + tint: get_translucent_tint(base_color: final_base_color, opacity: final_opacity), + mode: df::scatter_reflect_transmit + ) + : df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: dielectric_metal_mix, + weight: get_translucent_opacity(final_opacity)), + df::bsdf_component( + component: frosted_bsdf, + weight: 1.0-get_translucent_opacity(final_opacity)) + ) + ); +} +in material( + thin_walled: two_sided, // Graphene? + ior: color(refraction), //refraction + surface: material_surface( + scattering: final_mix_bsdf, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: get_emissive_intensity(emissive: final_emissive_color, opacity: final_opacity) + ) + ), + + geometry: material_geometry( + displacement: displacement, + normal: the_normal, + cutout_opacity: enable_opacity ? opacity_mask : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Gin/SM_Bottle_Gin.usd b/Goods/Props/Alcohol/SM_Bottle_Gin/SM_Bottle_Gin.usd new file mode 100644 index 0000000000000000000000000000000000000000..a1b1120b2f0f34f52b1260bcf5ea72eaba82fc49 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Bottle_Gin/SM_Bottle_Gin.usd differ diff --git a/Goods/Props/Alcohol/SM_Bottle_Oil/M_Bottle_Clean.mdl b/Goods/Props/Alcohol/SM_Bottle_Oil/M_Bottle_Clean.mdl new file mode 100644 index 0000000000000000000000000000000000000000..3dd679a43cdaab1fb9c27c72645b85aab523c482 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Oil/M_Bottle_Clean.mdl @@ -0,0 +1,59 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Bottle_Clean( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_N.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_D.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_M.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local1.w - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Oil/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Oil/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Oil/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Oil/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_Oil/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Oil/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_Oil/SM_Bottle_Oil.usd b/Goods/Props/Alcohol/SM_Bottle_Oil/SM_Bottle_Oil.usd new file mode 100644 index 0000000000000000000000000000000000000000..6b5fc907910ecd1b5046a7cf8138d522e55d1ecd Binary files /dev/null and b/Goods/Props/Alcohol/SM_Bottle_Oil/SM_Bottle_Oil.usd differ diff --git a/Goods/Props/Alcohol/SM_Bottle_Rum/M_Bottle_Clean.mdl b/Goods/Props/Alcohol/SM_Bottle_Rum/M_Bottle_Clean.mdl new file mode 100644 index 0000000000000000000000000000000000000000..3dd679a43cdaab1fb9c27c72645b85aab523c482 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Rum/M_Bottle_Clean.mdl @@ -0,0 +1,59 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Bottle_Clean( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_N.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_D.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_M.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local1.w - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Rum/M_Bottle_Glass_Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Rum/M_Bottle_Glass_Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..f310c4815f4f68509617c78d3f77f4070fdf8f8b --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Rum/M_Bottle_Glass_Base.mdl @@ -0,0 +1,115 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Translucent import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Bottle_Glass_Base( + uniform texture_2d Normal = texture_2d("./M_Bottle_Glass_Base/T_Bottle_Clean_4K_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Base_Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Base_Color"), + anno::ui_order(32) + ]], + float Metallic_Min = 0.8 + [[ + anno::display_name("Metallic_Min"), + anno::ui_order(32) + ]], + float Metallic_Max = 1.0 + [[ + anno::display_name("Metallic_Max"), + anno::ui_order(32) + ]], + float Roughness_Min = 0.2 + [[ + anno::display_name("Roughness_Min"), + anno::ui_order(32) + ]], + float Roughness_Max = 0.0 + [[ + anno::display_name("Roughness_Max"), + anno::ui_order(32) + ]], + float Opacity_Min = 0.2 + [[ + anno::display_name("Opacity_Min"), + anno::ui_order(32) + ]], + float Opacity_Max = 0.35 + [[ + anno::display_name("Opacity_Max"), + anno::ui_order(32) + ]], + float Liquid_Offset = 0.0 + [[ + anno::display_name("Liquid_Offset"), + anno::ui_order(32) + ]], + uniform float Refraction_Max = 1.5 + [[ + anno::display_name("Refraction_Max"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 Local5 = (::vertex_normal_world_space(true) * Liquid_Offset); + + float3 WorldPositionOffset_mdl = Local5; + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = ::fresnel(5.0, 0.04, ::pixel_normal_world_space(true)); + float Local2 = math::lerp(Metallic_Min,Metallic_Max,Local1); + float Local3 = math::lerp(Roughness_Min,Roughness_Max,Local1); + float Local4 = math::lerp(Opacity_Min,Opacity_Max,Local1); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float Opacity_mdl = Local4; + float OpacityMask_mdl = (math::saturate(Local4) - 1.0f / 255.0f) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = float3(Base_Color.x,Base_Color.y,Base_Color.z); + float Metallic_mdl = Local2; + float Specular_mdl = 0.5; + float Roughness_mdl = Local3; + float3 Refraction_mdl = math::max(float3(Refraction_Max,Refraction_Max,Refraction_Max), 1.0f); + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Translucent( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: Opacity_mdl, + opacity_mask: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + refraction: Refraction_mdl.x, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Rum/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Rum/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Rum/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Rum/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_Rum/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Rum/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_Rum/OmniUe4Translucent.mdl b/Goods/Props/Alcohol/SM_Bottle_Rum/OmniUe4Translucent.mdl new file mode 100644 index 0000000000000000000000000000000000000000..483a83004b8f7d5bf820a7905d06ea2d7d5894af --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Rum/OmniUe4Translucent.mdl @@ -0,0 +1,233 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - Emissive color affected by opacity +// - Support opacity mask +//* 1.0.2 - Unlit translucent +//* 1.0.3 - specular bsdf instead of microfacet ggx smith bsdf +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +color get_translucent_tint(color base_color, float opacity) +[[ + anno::description("base color of UE4 translucent"), + anno::noinline() +]] +{ + return math::lerp(color(1.0), base_color, opacity); +} + +// Just for UE4 distilling +float get_translucent_opacity(float opacity) +[[ + anno::noinline() +]] +{ + return opacity; +} + +color get_emissive_intensity(color emissive, float opacity) +[[ + anno::description("emissive color of UE4 translucent"), + anno::noinline() +]] +{ + return emissive * opacity; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - + tangent_v * normal.y + /* flip_tangent_v */ + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Translucent( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float opacity_mask = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform float refraction = 1.0, + uniform bool two_sided = false, + uniform bool is_tangent_space_normal = true, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Translucent"), + anno::description("Omni UE4 Translucent, supports UE4 Translucent shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "translucent")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::min(math::max(metallic, 0.0f), 0.99f); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_opacity = math::saturate(opacity); + float3 final_normal = math::normalize(normal); + + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color)); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + bsdf frosted_bsdf = df::specular_bsdf( + tint: color(1), + mode: df::scatter_reflect_transmit + ); + + bsdf final_mix_bsdf = + is_unlit ? df::specular_bsdf( + tint: get_translucent_tint(base_color: final_base_color, opacity: final_opacity), + mode: df::scatter_reflect_transmit + ) + : df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: dielectric_metal_mix, + weight: get_translucent_opacity(final_opacity)), + df::bsdf_component( + component: frosted_bsdf, + weight: 1.0-get_translucent_opacity(final_opacity)) + ) + ); +} +in material( + thin_walled: two_sided, // Graphene? + ior: color(refraction), //refraction + surface: material_surface( + scattering: final_mix_bsdf, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: get_emissive_intensity(emissive: final_emissive_color, opacity: final_opacity) + ) + ), + + geometry: material_geometry( + displacement: displacement, + normal: the_normal, + cutout_opacity: enable_opacity ? opacity_mask : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Rum/SM_Bottle_Rum.usd b/Goods/Props/Alcohol/SM_Bottle_Rum/SM_Bottle_Rum.usd new file mode 100644 index 0000000000000000000000000000000000000000..63dcb6c8a58782a25fe32f7d9a7b8dc364b529f3 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Bottle_Rum/SM_Bottle_Rum.usd differ diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01a/MI_Bottle_Set_Alcohol_NN_01a.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01a/MI_Bottle_Set_Alcohol_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..872359ea76523c538d99bd1f775d21fa42d4d0ee --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01a/MI_Bottle_Set_Alcohol_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bottle_Set_Alcohol_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.525525 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01a/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01a/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01a/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01a/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01a/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01a/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01a/SM_Bottle_Set_Alcohol_NN_01a.usd b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01a/SM_Bottle_Set_Alcohol_NN_01a.usd new file mode 100644 index 0000000000000000000000000000000000000000..e505a68e4a22efe245b278907ea3cb5dbfacd9ea Binary files /dev/null and b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01a/SM_Bottle_Set_Alcohol_NN_01a.usd differ diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01b/MI_Bottle_Set_Alcohol_NN_01a.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01b/MI_Bottle_Set_Alcohol_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..872359ea76523c538d99bd1f775d21fa42d4d0ee --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01b/MI_Bottle_Set_Alcohol_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bottle_Set_Alcohol_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.525525 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01b/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01b/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01b/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01b/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01b/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01b/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01b/SM_Bottle_Set_Alcohol_NN_01b.usd b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01b/SM_Bottle_Set_Alcohol_NN_01b.usd new file mode 100644 index 0000000000000000000000000000000000000000..939faa45c625cd5f62d6a043e472bd9495625180 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01b/SM_Bottle_Set_Alcohol_NN_01b.usd differ diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01c/MI_Bottle_Set_Alcohol_NN_01a.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01c/MI_Bottle_Set_Alcohol_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..872359ea76523c538d99bd1f775d21fa42d4d0ee --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01c/MI_Bottle_Set_Alcohol_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bottle_Set_Alcohol_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.525525 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01c/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01c/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01c/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01c/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01c/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01c/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01c/SM_Bottle_Set_Alcohol_NN_01c.usd b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01c/SM_Bottle_Set_Alcohol_NN_01c.usd new file mode 100644 index 0000000000000000000000000000000000000000..bd4778796068c6ba89fceb598897171e45674b89 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01c/SM_Bottle_Set_Alcohol_NN_01c.usd differ diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01d/MI_Bottle_Set_Alcohol_NN_01a.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01d/MI_Bottle_Set_Alcohol_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..872359ea76523c538d99bd1f775d21fa42d4d0ee --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01d/MI_Bottle_Set_Alcohol_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bottle_Set_Alcohol_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.525525 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01d/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01d/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01d/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01d/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01d/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01d/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01d/SM_Bottle_Set_Alcohol_NN_01d.usd b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01d/SM_Bottle_Set_Alcohol_NN_01d.usd new file mode 100644 index 0000000000000000000000000000000000000000..1533a63bd784ef3f6e3f6bd679c50c6aa8bcc2f2 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01d/SM_Bottle_Set_Alcohol_NN_01d.usd differ diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01e/MI_Bottle_Set_Alcohol_NN_01a.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01e/MI_Bottle_Set_Alcohol_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..872359ea76523c538d99bd1f775d21fa42d4d0ee --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01e/MI_Bottle_Set_Alcohol_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bottle_Set_Alcohol_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.525525 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01e/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01e/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01e/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01e/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01e/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01e/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01e/SM_Bottle_Set_Alcohol_NN_01e.usd b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01e/SM_Bottle_Set_Alcohol_NN_01e.usd new file mode 100644 index 0000000000000000000000000000000000000000..d23e352216ecb3ae4996fdd629170071109fa581 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01e/SM_Bottle_Set_Alcohol_NN_01e.usd differ diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01f/MI_Bottle_Set_Alcohol_NN_01a.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01f/MI_Bottle_Set_Alcohol_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..872359ea76523c538d99bd1f775d21fa42d4d0ee --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01f/MI_Bottle_Set_Alcohol_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bottle_Set_Alcohol_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.525525 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01f/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01f/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01f/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01f/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01f/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01f/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01f/SM_Bottle_Set_Alcohol_NN_01f.usd b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01f/SM_Bottle_Set_Alcohol_NN_01f.usd new file mode 100644 index 0000000000000000000000000000000000000000..6ef4e607893ea3966d3011546ecab8824b9b9815 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01f/SM_Bottle_Set_Alcohol_NN_01f.usd differ diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01g/MI_Bottle_Set_Alcohol_NN_01a.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01g/MI_Bottle_Set_Alcohol_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..872359ea76523c538d99bd1f775d21fa42d4d0ee --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01g/MI_Bottle_Set_Alcohol_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bottle_Set_Alcohol_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.525525 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01g/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01g/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01g/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01g/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01g/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01g/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01g/SM_Bottle_Set_Alcohol_NN_01g.usd b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01g/SM_Bottle_Set_Alcohol_NN_01g.usd new file mode 100644 index 0000000000000000000000000000000000000000..dc6432163d6a2ece695a64e4e4f7916ccba4c274 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01g/SM_Bottle_Set_Alcohol_NN_01g.usd differ diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01h/MI_Bottle_Set_Alcohol_NN_01a.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01h/MI_Bottle_Set_Alcohol_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..872359ea76523c538d99bd1f775d21fa42d4d0ee --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01h/MI_Bottle_Set_Alcohol_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bottle_Set_Alcohol_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.525525 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01h/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01h/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01h/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01h/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01h/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01h/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01h/SM_Bottle_Set_Alcohol_NN_01h.usd b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01h/SM_Bottle_Set_Alcohol_NN_01h.usd new file mode 100644 index 0000000000000000000000000000000000000000..617eb1f3cf80c4a89cdf8af6402b32b1a27c0c4b Binary files /dev/null and b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01h/SM_Bottle_Set_Alcohol_NN_01h.usd differ diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01i/MI_Bottle_Set_Alcohol_NN_01a.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01i/MI_Bottle_Set_Alcohol_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..872359ea76523c538d99bd1f775d21fa42d4d0ee --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01i/MI_Bottle_Set_Alcohol_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bottle_Set_Alcohol_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.525525 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01i/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01i/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01i/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01i/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01i/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01i/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01i/SM_Bottle_Set_Alcohol_NN_01i.usd b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01i/SM_Bottle_Set_Alcohol_NN_01i.usd new file mode 100644 index 0000000000000000000000000000000000000000..2f1bfbf7fdf6c872c3b937ba7b660ed5f13cbe6d Binary files /dev/null and b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01i/SM_Bottle_Set_Alcohol_NN_01i.usd differ diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01j/MI_Bottle_Set_Alcohol_NN_01a.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01j/MI_Bottle_Set_Alcohol_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..872359ea76523c538d99bd1f775d21fa42d4d0ee --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01j/MI_Bottle_Set_Alcohol_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bottle_Set_Alcohol_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.525525 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01j/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01j/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01j/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01j/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01j/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01j/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01j/SM_Bottle_Set_Alcohol_NN_01j.usd b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01j/SM_Bottle_Set_Alcohol_NN_01j.usd new file mode 100644 index 0000000000000000000000000000000000000000..40d0aff02f795723e051b9cd43ff8beb81687d49 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01j/SM_Bottle_Set_Alcohol_NN_01j.usd differ diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01k/MI_Bottle_Set_Alcohol_NN_01a.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01k/MI_Bottle_Set_Alcohol_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..872359ea76523c538d99bd1f775d21fa42d4d0ee --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01k/MI_Bottle_Set_Alcohol_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bottle_Set_Alcohol_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.525525 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01k/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01k/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01k/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01k/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01k/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01k/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01k/SM_Bottle_Set_Alcohol_NN_01k.usd b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01k/SM_Bottle_Set_Alcohol_NN_01k.usd new file mode 100644 index 0000000000000000000000000000000000000000..591fb8c176f707d507e34ccddb77192ef291204f Binary files /dev/null and b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01k/SM_Bottle_Set_Alcohol_NN_01k.usd differ diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01l/MI_Bottle_Set_Alcohol_NN_01a.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01l/MI_Bottle_Set_Alcohol_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..872359ea76523c538d99bd1f775d21fa42d4d0ee --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01l/MI_Bottle_Set_Alcohol_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bottle_Set_Alcohol_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.525525 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01l/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01l/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01l/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01l/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01l/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01l/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01m/MI_Bottle_Set_Alcohol_NN_01a.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01m/MI_Bottle_Set_Alcohol_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..872359ea76523c538d99bd1f775d21fa42d4d0ee --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01m/MI_Bottle_Set_Alcohol_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bottle_Set_Alcohol_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.525525 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01m/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01m/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01m/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01m/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01m/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01m/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01m/SM_Bottle_Set_Alcohol_NN_01m.usd b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01m/SM_Bottle_Set_Alcohol_NN_01m.usd new file mode 100644 index 0000000000000000000000000000000000000000..81886c4a9cb4cfcf634e5ccc27d9c4efeb6f8da3 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01m/SM_Bottle_Set_Alcohol_NN_01m.usd differ diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01n/MI_Bottle_Set_Alcohol_NN_01a.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01n/MI_Bottle_Set_Alcohol_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..872359ea76523c538d99bd1f775d21fa42d4d0ee --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01n/MI_Bottle_Set_Alcohol_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bottle_Set_Alcohol_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.525525 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01n/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01n/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01n/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01n/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01n/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01n/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01n/SM_Bottle_Set_Alcohol_NN_01n.usd b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01n/SM_Bottle_Set_Alcohol_NN_01n.usd new file mode 100644 index 0000000000000000000000000000000000000000..10de0a3dd5ca8f1154009d39f65036c06e2d1c06 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01n/SM_Bottle_Set_Alcohol_NN_01n.usd differ diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01o/MI_Bottle_Set_Alcohol_NN_01a.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01o/MI_Bottle_Set_Alcohol_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..872359ea76523c538d99bd1f775d21fa42d4d0ee --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01o/MI_Bottle_Set_Alcohol_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bottle_Set_Alcohol_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Bottle_Set_Alcohol_NN_01a/TX_Bottle_Set_Alcohol_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.525525 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01o/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01o/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01o/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01o/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01o/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01o/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01o/SM_Bottle_Set_Alcohol_NN_01o.usd b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01o/SM_Bottle_Set_Alcohol_NN_01o.usd new file mode 100644 index 0000000000000000000000000000000000000000..30c2a10820effca363d769ed79dc429ab35cdfc0 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Bottle_Set_Alcohol_NN_01o/SM_Bottle_Set_Alcohol_NN_01o.usd differ diff --git a/Goods/Props/Alcohol/SM_Bottle_SmallWater/M_Bottle_Clean.mdl b/Goods/Props/Alcohol/SM_Bottle_SmallWater/M_Bottle_Clean.mdl new file mode 100644 index 0000000000000000000000000000000000000000..3dd679a43cdaab1fb9c27c72645b85aab523c482 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_SmallWater/M_Bottle_Clean.mdl @@ -0,0 +1,59 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Bottle_Clean( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_N.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_D.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_M.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local1.w - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_SmallWater/M_Bottle_Glass_Base.mdl b/Goods/Props/Alcohol/SM_Bottle_SmallWater/M_Bottle_Glass_Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..f310c4815f4f68509617c78d3f77f4070fdf8f8b --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_SmallWater/M_Bottle_Glass_Base.mdl @@ -0,0 +1,115 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Translucent import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Bottle_Glass_Base( + uniform texture_2d Normal = texture_2d("./M_Bottle_Glass_Base/T_Bottle_Clean_4K_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Base_Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Base_Color"), + anno::ui_order(32) + ]], + float Metallic_Min = 0.8 + [[ + anno::display_name("Metallic_Min"), + anno::ui_order(32) + ]], + float Metallic_Max = 1.0 + [[ + anno::display_name("Metallic_Max"), + anno::ui_order(32) + ]], + float Roughness_Min = 0.2 + [[ + anno::display_name("Roughness_Min"), + anno::ui_order(32) + ]], + float Roughness_Max = 0.0 + [[ + anno::display_name("Roughness_Max"), + anno::ui_order(32) + ]], + float Opacity_Min = 0.2 + [[ + anno::display_name("Opacity_Min"), + anno::ui_order(32) + ]], + float Opacity_Max = 0.35 + [[ + anno::display_name("Opacity_Max"), + anno::ui_order(32) + ]], + float Liquid_Offset = 0.0 + [[ + anno::display_name("Liquid_Offset"), + anno::ui_order(32) + ]], + uniform float Refraction_Max = 1.5 + [[ + anno::display_name("Refraction_Max"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 Local5 = (::vertex_normal_world_space(true) * Liquid_Offset); + + float3 WorldPositionOffset_mdl = Local5; + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = ::fresnel(5.0, 0.04, ::pixel_normal_world_space(true)); + float Local2 = math::lerp(Metallic_Min,Metallic_Max,Local1); + float Local3 = math::lerp(Roughness_Min,Roughness_Max,Local1); + float Local4 = math::lerp(Opacity_Min,Opacity_Max,Local1); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float Opacity_mdl = Local4; + float OpacityMask_mdl = (math::saturate(Local4) - 1.0f / 255.0f) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = float3(Base_Color.x,Base_Color.y,Base_Color.z); + float Metallic_mdl = Local2; + float Specular_mdl = 0.5; + float Roughness_mdl = Local3; + float3 Refraction_mdl = math::max(float3(Refraction_Max,Refraction_Max,Refraction_Max), 1.0f); + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Translucent( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: Opacity_mdl, + opacity_mask: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + refraction: Refraction_mdl.x, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_SmallWater/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_SmallWater/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_SmallWater/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_SmallWater/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_SmallWater/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_SmallWater/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_SmallWater/OmniUe4Translucent.mdl b/Goods/Props/Alcohol/SM_Bottle_SmallWater/OmniUe4Translucent.mdl new file mode 100644 index 0000000000000000000000000000000000000000..483a83004b8f7d5bf820a7905d06ea2d7d5894af --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_SmallWater/OmniUe4Translucent.mdl @@ -0,0 +1,233 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - Emissive color affected by opacity +// - Support opacity mask +//* 1.0.2 - Unlit translucent +//* 1.0.3 - specular bsdf instead of microfacet ggx smith bsdf +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +color get_translucent_tint(color base_color, float opacity) +[[ + anno::description("base color of UE4 translucent"), + anno::noinline() +]] +{ + return math::lerp(color(1.0), base_color, opacity); +} + +// Just for UE4 distilling +float get_translucent_opacity(float opacity) +[[ + anno::noinline() +]] +{ + return opacity; +} + +color get_emissive_intensity(color emissive, float opacity) +[[ + anno::description("emissive color of UE4 translucent"), + anno::noinline() +]] +{ + return emissive * opacity; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - + tangent_v * normal.y + /* flip_tangent_v */ + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Translucent( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float opacity_mask = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform float refraction = 1.0, + uniform bool two_sided = false, + uniform bool is_tangent_space_normal = true, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Translucent"), + anno::description("Omni UE4 Translucent, supports UE4 Translucent shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "translucent")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::min(math::max(metallic, 0.0f), 0.99f); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_opacity = math::saturate(opacity); + float3 final_normal = math::normalize(normal); + + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color)); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + bsdf frosted_bsdf = df::specular_bsdf( + tint: color(1), + mode: df::scatter_reflect_transmit + ); + + bsdf final_mix_bsdf = + is_unlit ? df::specular_bsdf( + tint: get_translucent_tint(base_color: final_base_color, opacity: final_opacity), + mode: df::scatter_reflect_transmit + ) + : df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: dielectric_metal_mix, + weight: get_translucent_opacity(final_opacity)), + df::bsdf_component( + component: frosted_bsdf, + weight: 1.0-get_translucent_opacity(final_opacity)) + ) + ); +} +in material( + thin_walled: two_sided, // Graphene? + ior: color(refraction), //refraction + surface: material_surface( + scattering: final_mix_bsdf, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: get_emissive_intensity(emissive: final_emissive_color, opacity: final_opacity) + ) + ), + + geometry: material_geometry( + displacement: displacement, + normal: the_normal, + cutout_opacity: enable_opacity ? opacity_mask : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Vodka/M_Bottle_Clean.mdl b/Goods/Props/Alcohol/SM_Bottle_Vodka/M_Bottle_Clean.mdl new file mode 100644 index 0000000000000000000000000000000000000000..3dd679a43cdaab1fb9c27c72645b85aab523c482 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Vodka/M_Bottle_Clean.mdl @@ -0,0 +1,59 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Bottle_Clean( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_N.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_D.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_M.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local1.w - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Vodka/M_Bottle_Glass_Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Vodka/M_Bottle_Glass_Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..f310c4815f4f68509617c78d3f77f4070fdf8f8b --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Vodka/M_Bottle_Glass_Base.mdl @@ -0,0 +1,115 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Translucent import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Bottle_Glass_Base( + uniform texture_2d Normal = texture_2d("./M_Bottle_Glass_Base/T_Bottle_Clean_4K_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Base_Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Base_Color"), + anno::ui_order(32) + ]], + float Metallic_Min = 0.8 + [[ + anno::display_name("Metallic_Min"), + anno::ui_order(32) + ]], + float Metallic_Max = 1.0 + [[ + anno::display_name("Metallic_Max"), + anno::ui_order(32) + ]], + float Roughness_Min = 0.2 + [[ + anno::display_name("Roughness_Min"), + anno::ui_order(32) + ]], + float Roughness_Max = 0.0 + [[ + anno::display_name("Roughness_Max"), + anno::ui_order(32) + ]], + float Opacity_Min = 0.2 + [[ + anno::display_name("Opacity_Min"), + anno::ui_order(32) + ]], + float Opacity_Max = 0.35 + [[ + anno::display_name("Opacity_Max"), + anno::ui_order(32) + ]], + float Liquid_Offset = 0.0 + [[ + anno::display_name("Liquid_Offset"), + anno::ui_order(32) + ]], + uniform float Refraction_Max = 1.5 + [[ + anno::display_name("Refraction_Max"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 Local5 = (::vertex_normal_world_space(true) * Liquid_Offset); + + float3 WorldPositionOffset_mdl = Local5; + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = ::fresnel(5.0, 0.04, ::pixel_normal_world_space(true)); + float Local2 = math::lerp(Metallic_Min,Metallic_Max,Local1); + float Local3 = math::lerp(Roughness_Min,Roughness_Max,Local1); + float Local4 = math::lerp(Opacity_Min,Opacity_Max,Local1); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float Opacity_mdl = Local4; + float OpacityMask_mdl = (math::saturate(Local4) - 1.0f / 255.0f) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = float3(Base_Color.x,Base_Color.y,Base_Color.z); + float Metallic_mdl = Local2; + float Specular_mdl = 0.5; + float Roughness_mdl = Local3; + float3 Refraction_mdl = math::max(float3(Refraction_Max,Refraction_Max,Refraction_Max), 1.0f); + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Translucent( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: Opacity_mdl, + opacity_mask: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + refraction: Refraction_mdl.x, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Vodka/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Vodka/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Vodka/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Vodka/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_Vodka/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Vodka/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_Vodka/OmniUe4Translucent.mdl b/Goods/Props/Alcohol/SM_Bottle_Vodka/OmniUe4Translucent.mdl new file mode 100644 index 0000000000000000000000000000000000000000..483a83004b8f7d5bf820a7905d06ea2d7d5894af --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Vodka/OmniUe4Translucent.mdl @@ -0,0 +1,233 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - Emissive color affected by opacity +// - Support opacity mask +//* 1.0.2 - Unlit translucent +//* 1.0.3 - specular bsdf instead of microfacet ggx smith bsdf +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +color get_translucent_tint(color base_color, float opacity) +[[ + anno::description("base color of UE4 translucent"), + anno::noinline() +]] +{ + return math::lerp(color(1.0), base_color, opacity); +} + +// Just for UE4 distilling +float get_translucent_opacity(float opacity) +[[ + anno::noinline() +]] +{ + return opacity; +} + +color get_emissive_intensity(color emissive, float opacity) +[[ + anno::description("emissive color of UE4 translucent"), + anno::noinline() +]] +{ + return emissive * opacity; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - + tangent_v * normal.y + /* flip_tangent_v */ + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Translucent( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float opacity_mask = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform float refraction = 1.0, + uniform bool two_sided = false, + uniform bool is_tangent_space_normal = true, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Translucent"), + anno::description("Omni UE4 Translucent, supports UE4 Translucent shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "translucent")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::min(math::max(metallic, 0.0f), 0.99f); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_opacity = math::saturate(opacity); + float3 final_normal = math::normalize(normal); + + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color)); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + bsdf frosted_bsdf = df::specular_bsdf( + tint: color(1), + mode: df::scatter_reflect_transmit + ); + + bsdf final_mix_bsdf = + is_unlit ? df::specular_bsdf( + tint: get_translucent_tint(base_color: final_base_color, opacity: final_opacity), + mode: df::scatter_reflect_transmit + ) + : df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: dielectric_metal_mix, + weight: get_translucent_opacity(final_opacity)), + df::bsdf_component( + component: frosted_bsdf, + weight: 1.0-get_translucent_opacity(final_opacity)) + ) + ); +} +in material( + thin_walled: two_sided, // Graphene? + ior: color(refraction), //refraction + surface: material_surface( + scattering: final_mix_bsdf, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: get_emissive_intensity(emissive: final_emissive_color, opacity: final_opacity) + ) + ), + + geometry: material_geometry( + displacement: displacement, + normal: the_normal, + cutout_opacity: enable_opacity ? opacity_mask : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Vodka/SM_Bottle_Vodka.usd b/Goods/Props/Alcohol/SM_Bottle_Vodka/SM_Bottle_Vodka.usd new file mode 100644 index 0000000000000000000000000000000000000000..0c5a71ab747673e16db6501a7f191263c5bf4c20 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Bottle_Vodka/SM_Bottle_Vodka.usd differ diff --git a/Goods/Props/Alcohol/SM_Bottle_Whiskey/M_Bottle_Clean.mdl b/Goods/Props/Alcohol/SM_Bottle_Whiskey/M_Bottle_Clean.mdl new file mode 100644 index 0000000000000000000000000000000000000000..3dd679a43cdaab1fb9c27c72645b85aab523c482 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Whiskey/M_Bottle_Clean.mdl @@ -0,0 +1,59 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Bottle_Clean( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_N.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_D.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_M.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local1.w - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Whiskey/M_Bottle_Glass_Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Whiskey/M_Bottle_Glass_Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..f310c4815f4f68509617c78d3f77f4070fdf8f8b --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Whiskey/M_Bottle_Glass_Base.mdl @@ -0,0 +1,115 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Translucent import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Bottle_Glass_Base( + uniform texture_2d Normal = texture_2d("./M_Bottle_Glass_Base/T_Bottle_Clean_4K_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Base_Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Base_Color"), + anno::ui_order(32) + ]], + float Metallic_Min = 0.8 + [[ + anno::display_name("Metallic_Min"), + anno::ui_order(32) + ]], + float Metallic_Max = 1.0 + [[ + anno::display_name("Metallic_Max"), + anno::ui_order(32) + ]], + float Roughness_Min = 0.2 + [[ + anno::display_name("Roughness_Min"), + anno::ui_order(32) + ]], + float Roughness_Max = 0.0 + [[ + anno::display_name("Roughness_Max"), + anno::ui_order(32) + ]], + float Opacity_Min = 0.2 + [[ + anno::display_name("Opacity_Min"), + anno::ui_order(32) + ]], + float Opacity_Max = 0.35 + [[ + anno::display_name("Opacity_Max"), + anno::ui_order(32) + ]], + float Liquid_Offset = 0.0 + [[ + anno::display_name("Liquid_Offset"), + anno::ui_order(32) + ]], + uniform float Refraction_Max = 1.5 + [[ + anno::display_name("Refraction_Max"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 Local5 = (::vertex_normal_world_space(true) * Liquid_Offset); + + float3 WorldPositionOffset_mdl = Local5; + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = ::fresnel(5.0, 0.04, ::pixel_normal_world_space(true)); + float Local2 = math::lerp(Metallic_Min,Metallic_Max,Local1); + float Local3 = math::lerp(Roughness_Min,Roughness_Max,Local1); + float Local4 = math::lerp(Opacity_Min,Opacity_Max,Local1); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float Opacity_mdl = Local4; + float OpacityMask_mdl = (math::saturate(Local4) - 1.0f / 255.0f) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = float3(Base_Color.x,Base_Color.y,Base_Color.z); + float Metallic_mdl = Local2; + float Specular_mdl = 0.5; + float Roughness_mdl = Local3; + float3 Refraction_mdl = math::max(float3(Refraction_Max,Refraction_Max,Refraction_Max), 1.0f); + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Translucent( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: Opacity_mdl, + opacity_mask: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + refraction: Refraction_mdl.x, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Whiskey/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Whiskey/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Whiskey/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Whiskey/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_Whiskey/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Whiskey/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_Whiskey/OmniUe4Translucent.mdl b/Goods/Props/Alcohol/SM_Bottle_Whiskey/OmniUe4Translucent.mdl new file mode 100644 index 0000000000000000000000000000000000000000..483a83004b8f7d5bf820a7905d06ea2d7d5894af --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Whiskey/OmniUe4Translucent.mdl @@ -0,0 +1,233 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - Emissive color affected by opacity +// - Support opacity mask +//* 1.0.2 - Unlit translucent +//* 1.0.3 - specular bsdf instead of microfacet ggx smith bsdf +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +color get_translucent_tint(color base_color, float opacity) +[[ + anno::description("base color of UE4 translucent"), + anno::noinline() +]] +{ + return math::lerp(color(1.0), base_color, opacity); +} + +// Just for UE4 distilling +float get_translucent_opacity(float opacity) +[[ + anno::noinline() +]] +{ + return opacity; +} + +color get_emissive_intensity(color emissive, float opacity) +[[ + anno::description("emissive color of UE4 translucent"), + anno::noinline() +]] +{ + return emissive * opacity; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - + tangent_v * normal.y + /* flip_tangent_v */ + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Translucent( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float opacity_mask = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform float refraction = 1.0, + uniform bool two_sided = false, + uniform bool is_tangent_space_normal = true, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Translucent"), + anno::description("Omni UE4 Translucent, supports UE4 Translucent shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "translucent")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::min(math::max(metallic, 0.0f), 0.99f); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_opacity = math::saturate(opacity); + float3 final_normal = math::normalize(normal); + + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color)); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + bsdf frosted_bsdf = df::specular_bsdf( + tint: color(1), + mode: df::scatter_reflect_transmit + ); + + bsdf final_mix_bsdf = + is_unlit ? df::specular_bsdf( + tint: get_translucent_tint(base_color: final_base_color, opacity: final_opacity), + mode: df::scatter_reflect_transmit + ) + : df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: dielectric_metal_mix, + weight: get_translucent_opacity(final_opacity)), + df::bsdf_component( + component: frosted_bsdf, + weight: 1.0-get_translucent_opacity(final_opacity)) + ) + ); +} +in material( + thin_walled: two_sided, // Graphene? + ior: color(refraction), //refraction + surface: material_surface( + scattering: final_mix_bsdf, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: get_emissive_intensity(emissive: final_emissive_color, opacity: final_opacity) + ) + ), + + geometry: material_geometry( + displacement: displacement, + normal: the_normal, + cutout_opacity: enable_opacity ? opacity_mask : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Whiskey/SM_Bottle_Whiskey.usd b/Goods/Props/Alcohol/SM_Bottle_Whiskey/SM_Bottle_Whiskey.usd new file mode 100644 index 0000000000000000000000000000000000000000..05bc98c1dd14f4e8d534b9f58bb7fbe1d0bcbd49 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Bottle_Whiskey/SM_Bottle_Whiskey.usd differ diff --git a/Goods/Props/Alcohol/SM_Bottle_Wine/M_Bottle_Clean.mdl b/Goods/Props/Alcohol/SM_Bottle_Wine/M_Bottle_Clean.mdl new file mode 100644 index 0000000000000000000000000000000000000000..3dd679a43cdaab1fb9c27c72645b85aab523c482 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Wine/M_Bottle_Clean.mdl @@ -0,0 +1,59 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Bottle_Clean( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_N.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_D.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_Bottle_Clean/T_Bottle_Clean_4K_M.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local1.w - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Bottle_Wine/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Bottle_Wine/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Wine/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Bottle_Wine/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Bottle_Wine/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Bottle_Wine/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Bottle_Wine/SM_Bottle_Wine.usd b/Goods/Props/Alcohol/SM_Bottle_Wine/SM_Bottle_Wine.usd new file mode 100644 index 0000000000000000000000000000000000000000..1e052416d8a66ce2cb852f7ee2c79b3c1d87d6d1 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Bottle_Wine/SM_Bottle_Wine.usd differ diff --git a/Goods/Props/Alcohol/SM_Wine/M_Grocery1.mdl b/Goods/Props/Alcohol/SM_Wine/M_Grocery1.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a8b4979d4daa3e0b75185a96cdf225a104287696 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Wine/M_Grocery1.mdl @@ -0,0 +1,60 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Grocery1( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_Grocery1/T_Grocery1_Normal_OpenGL.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_Grocery1/T_Grocery1_Base_Color.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_Grocery1/T_Grocery1_Metallic.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local3 = tex::lookup_float4(texture_2d("./M_Grocery1/T_Grocery1_Opacity.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (float3(Local3.x,Local3.y,Local3.z).x - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = float3(Local2.x,Local2.y,Local2.z).x; + float Specular_mdl = 0.5; + float Roughness_mdl = 0.5; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Wine/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Wine/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Wine/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Wine/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Wine/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Wine/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Wine/SM_Wine.usd b/Goods/Props/Alcohol/SM_Wine/SM_Wine.usd new file mode 100644 index 0000000000000000000000000000000000000000..840de386e8ff497b4622dc80fb5cab7a3fb8c203 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Wine/SM_Wine.usd differ diff --git a/Goods/Props/Alcohol/SM_WineBottle01/MI_WineBottles_Inst.mdl b/Goods/Props/Alcohol/SM_WineBottle01/MI_WineBottles_Inst.mdl new file mode 100644 index 0000000000000000000000000000000000000000..5ddaef55d3ff05071aaeb754d4ce3c75ba5d066e --- /dev/null +++ b/Goods/Props/Alcohol/SM_WineBottle01/MI_WineBottles_Inst.mdl @@ -0,0 +1,100 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_WineBottles_Inst( + uniform texture_2d NRM = texture_2d("./MI_WineBottles_Inst/T_WineBottles_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("NRM"), + anno::ui_order(32), + sampler_normal() + ]], + uniform texture_2d Diff = texture_2d("./MI_WineBottles_Inst/T_WineBottles_Diff.png",::tex::gamma_srgb) + [[ + anno::display_name("Diff"), + anno::ui_order(32), + sampler_color() + ]], + float Main_Brightness = 0.9 + [[ + anno::display_name("Main_Brightness"), + anno::ui_order(32) + ]], + float Secondary_Brightness = 5.0 + [[ + anno::display_name("Secondary_Brightness"), + anno::ui_order(32) + ]], + uniform texture_2d PBR = texture_2d("./MI_WineBottles_Inst/T_WineBottles_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("PBR"), + anno::ui_order(32), + sampler_color() + ]], + float Fresnel_Exponent = 0.1 + [[ + anno::display_name("Fresnel_Exponent"), + anno::ui_order(32) + ]], + float Fresnel_BRF = -10.0 + [[ + anno::display_name("Fresnel_BRF"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(NRM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(Diff,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local2 = (float3(Local1.x,Local1.y,Local1.z) * Main_Brightness); + float3 Local3 = (Secondary_Brightness * float3(Local1.x,Local1.y,Local1.z)); + float4 Local4 = tex::lookup_float4(PBR,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = math::lerp(Local2,Local3,Local4.z); + float Local6 = ::fresnel(Fresnel_Exponent, Fresnel_BRF, ::pixel_normal_world_space(true)); + float Local7 = (1.0 - Local6); + float3 Local8 = math::lerp(Local2,Local5,Local7); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local8; + float Metallic_mdl = Local4.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local4.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_WineBottle01/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_WineBottle01/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_WineBottle01/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_WineBottle01/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_WineBottle01/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_WineBottle01/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_WineBottle01/SM_WineBottle01.usd b/Goods/Props/Alcohol/SM_WineBottle01/SM_WineBottle01.usd new file mode 100644 index 0000000000000000000000000000000000000000..6a4d78bafbcd9f5241c61e6102c81f1adba0860c Binary files /dev/null and b/Goods/Props/Alcohol/SM_WineBottle01/SM_WineBottle01.usd differ diff --git a/Goods/Props/Alcohol/SM_WineBottle02/MI_WineBottles_Inst.mdl b/Goods/Props/Alcohol/SM_WineBottle02/MI_WineBottles_Inst.mdl new file mode 100644 index 0000000000000000000000000000000000000000..5ddaef55d3ff05071aaeb754d4ce3c75ba5d066e --- /dev/null +++ b/Goods/Props/Alcohol/SM_WineBottle02/MI_WineBottles_Inst.mdl @@ -0,0 +1,100 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_WineBottles_Inst( + uniform texture_2d NRM = texture_2d("./MI_WineBottles_Inst/T_WineBottles_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("NRM"), + anno::ui_order(32), + sampler_normal() + ]], + uniform texture_2d Diff = texture_2d("./MI_WineBottles_Inst/T_WineBottles_Diff.png",::tex::gamma_srgb) + [[ + anno::display_name("Diff"), + anno::ui_order(32), + sampler_color() + ]], + float Main_Brightness = 0.9 + [[ + anno::display_name("Main_Brightness"), + anno::ui_order(32) + ]], + float Secondary_Brightness = 5.0 + [[ + anno::display_name("Secondary_Brightness"), + anno::ui_order(32) + ]], + uniform texture_2d PBR = texture_2d("./MI_WineBottles_Inst/T_WineBottles_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("PBR"), + anno::ui_order(32), + sampler_color() + ]], + float Fresnel_Exponent = 0.1 + [[ + anno::display_name("Fresnel_Exponent"), + anno::ui_order(32) + ]], + float Fresnel_BRF = -10.0 + [[ + anno::display_name("Fresnel_BRF"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(NRM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(Diff,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local2 = (float3(Local1.x,Local1.y,Local1.z) * Main_Brightness); + float3 Local3 = (Secondary_Brightness * float3(Local1.x,Local1.y,Local1.z)); + float4 Local4 = tex::lookup_float4(PBR,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = math::lerp(Local2,Local3,Local4.z); + float Local6 = ::fresnel(Fresnel_Exponent, Fresnel_BRF, ::pixel_normal_world_space(true)); + float Local7 = (1.0 - Local6); + float3 Local8 = math::lerp(Local2,Local5,Local7); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local8; + float Metallic_mdl = Local4.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local4.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_WineBottle02/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_WineBottle02/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_WineBottle02/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_WineBottle02/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_WineBottle02/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_WineBottle02/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_WineBottle02/SM_WineBottle02.usd b/Goods/Props/Alcohol/SM_WineBottle02/SM_WineBottle02.usd new file mode 100644 index 0000000000000000000000000000000000000000..1ae1be58f2a386e70a6043507140ae50b0a9979e Binary files /dev/null and b/Goods/Props/Alcohol/SM_WineBottle02/SM_WineBottle02.usd differ diff --git a/Goods/Props/Alcohol/SM_WineBottle03/MI_WineBottles_Inst.mdl b/Goods/Props/Alcohol/SM_WineBottle03/MI_WineBottles_Inst.mdl new file mode 100644 index 0000000000000000000000000000000000000000..5ddaef55d3ff05071aaeb754d4ce3c75ba5d066e --- /dev/null +++ b/Goods/Props/Alcohol/SM_WineBottle03/MI_WineBottles_Inst.mdl @@ -0,0 +1,100 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_WineBottles_Inst( + uniform texture_2d NRM = texture_2d("./MI_WineBottles_Inst/T_WineBottles_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("NRM"), + anno::ui_order(32), + sampler_normal() + ]], + uniform texture_2d Diff = texture_2d("./MI_WineBottles_Inst/T_WineBottles_Diff.png",::tex::gamma_srgb) + [[ + anno::display_name("Diff"), + anno::ui_order(32), + sampler_color() + ]], + float Main_Brightness = 0.9 + [[ + anno::display_name("Main_Brightness"), + anno::ui_order(32) + ]], + float Secondary_Brightness = 5.0 + [[ + anno::display_name("Secondary_Brightness"), + anno::ui_order(32) + ]], + uniform texture_2d PBR = texture_2d("./MI_WineBottles_Inst/T_WineBottles_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("PBR"), + anno::ui_order(32), + sampler_color() + ]], + float Fresnel_Exponent = 0.1 + [[ + anno::display_name("Fresnel_Exponent"), + anno::ui_order(32) + ]], + float Fresnel_BRF = -10.0 + [[ + anno::display_name("Fresnel_BRF"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(NRM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(Diff,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local2 = (float3(Local1.x,Local1.y,Local1.z) * Main_Brightness); + float3 Local3 = (Secondary_Brightness * float3(Local1.x,Local1.y,Local1.z)); + float4 Local4 = tex::lookup_float4(PBR,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = math::lerp(Local2,Local3,Local4.z); + float Local6 = ::fresnel(Fresnel_Exponent, Fresnel_BRF, ::pixel_normal_world_space(true)); + float Local7 = (1.0 - Local6); + float3 Local8 = math::lerp(Local2,Local5,Local7); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local8; + float Metallic_mdl = Local4.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local4.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_WineBottle03/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_WineBottle03/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_WineBottle03/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_WineBottle03/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_WineBottle03/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_WineBottle03/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_WineBottle03/SM_WineBottle03.usd b/Goods/Props/Alcohol/SM_WineBottle03/SM_WineBottle03.usd new file mode 100644 index 0000000000000000000000000000000000000000..3a6b3804e954a620462a49e2f5a84732e9e18e7c Binary files /dev/null and b/Goods/Props/Alcohol/SM_WineBottle03/SM_WineBottle03.usd differ diff --git a/Goods/Props/Alcohol/SM_Wine_1/M_Group_5.mdl b/Goods/Props/Alcohol/SM_Wine_1/M_Group_5.mdl new file mode 100644 index 0000000000000000000000000000000000000000..5e07c8335ab1895078898583dcdc6abe8f1f0053 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Wine_1/M_Group_5.mdl @@ -0,0 +1,56 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Group_5( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_Group_5/T_Group_5_N.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_Group_5/T_Group_5_D.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_Group_5/T_Group_5_M.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Wine_1/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Wine_1/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Wine_1/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Wine_1/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Wine_1/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Wine_1/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Wine_1/SM_Wine_1.usd b/Goods/Props/Alcohol/SM_Wine_1/SM_Wine_1.usd new file mode 100644 index 0000000000000000000000000000000000000000..22bdf372ca11d52ca66944aa0a2d6ad53f4863fd Binary files /dev/null and b/Goods/Props/Alcohol/SM_Wine_1/SM_Wine_1.usd differ diff --git a/Goods/Props/Alcohol/SM_Wine_2/M_Group_5.mdl b/Goods/Props/Alcohol/SM_Wine_2/M_Group_5.mdl new file mode 100644 index 0000000000000000000000000000000000000000..5e07c8335ab1895078898583dcdc6abe8f1f0053 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Wine_2/M_Group_5.mdl @@ -0,0 +1,56 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Group_5( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_Group_5/T_Group_5_N.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_Group_5/T_Group_5_D.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_Group_5/T_Group_5_M.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Wine_2/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Wine_2/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Wine_2/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Wine_2/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Wine_2/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Wine_2/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Wine_2/SM_Wine_2.usd b/Goods/Props/Alcohol/SM_Wine_2/SM_Wine_2.usd new file mode 100644 index 0000000000000000000000000000000000000000..0f3f160b139c96d26526abf3d4bf29d85732baea Binary files /dev/null and b/Goods/Props/Alcohol/SM_Wine_2/SM_Wine_2.usd differ diff --git a/Goods/Props/Alcohol/SM_Wine_3/M_Group_5.mdl b/Goods/Props/Alcohol/SM_Wine_3/M_Group_5.mdl new file mode 100644 index 0000000000000000000000000000000000000000..5e07c8335ab1895078898583dcdc6abe8f1f0053 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Wine_3/M_Group_5.mdl @@ -0,0 +1,56 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Group_5( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_Group_5/T_Group_5_N.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_Group_5/T_Group_5_D.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_Group_5/T_Group_5_M.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Alcohol/SM_Wine_3/OmniUe4Base.mdl b/Goods/Props/Alcohol/SM_Wine_3/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Wine_3/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Alcohol/SM_Wine_3/OmniUe4Function.mdl b/Goods/Props/Alcohol/SM_Wine_3/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Alcohol/SM_Wine_3/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Alcohol/SM_Wine_3/SM_Wine_3.usd b/Goods/Props/Alcohol/SM_Wine_3/SM_Wine_3.usd new file mode 100644 index 0000000000000000000000000000000000000000..8f348464df34f74f1b160dd2bce88bb564c65837 Binary files /dev/null and b/Goods/Props/Alcohol/SM_Wine_3/SM_Wine_3.usd differ diff --git 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b/Goods/Props/Chair/VP_Coffee_Chair_LOD0/VP_Chair_Light/VP_plywood_panel_05_diffuse.png @@ -0,0 +1,3 @@ +version https://git-lfs.github.com/spec/v1 +oid sha256:9a6090f314a02183a16844e9d04b37dbff6b65afb2fd961975ac12d2ffb92327 +size 13273944 diff --git a/Goods/Props/Chair/VP_Coffee_Chair_LOD0/VP_Coffee_Chair_LOD0.usd b/Goods/Props/Chair/VP_Coffee_Chair_LOD0/VP_Coffee_Chair_LOD0.usd new file mode 100644 index 0000000000000000000000000000000000000000..4006ddc770b5a1c68ad5b205a0bcb5c6594fc96c --- /dev/null +++ b/Goods/Props/Chair/VP_Coffee_Chair_LOD0/VP_Coffee_Chair_LOD0.usd @@ -0,0 +1,3 @@ +version https://git-lfs.github.com/spec/v1 +oid sha256:cca04557638851960d2c039724b74b4cc9ac43d221e3d1a2d259d9b64ab26b0f +size 2182634 diff --git a/Goods/Props/Cigarettes/SM_Cig01/MI_Cigarettes.mdl b/Goods/Props/Cigarettes/SM_Cig01/MI_Cigarettes.mdl new file mode 100644 index 0000000000000000000000000000000000000000..6cb32ce7659d5d747b5ee2503a2dbdec2d2ae6c9 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Cig01/MI_Cigarettes.mdl @@ -0,0 +1,99 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Cigarettes( + float Tile = 1.0 + [[ + anno::display_name("Tile"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + uniform texture_2d Normal = texture_2d("./MI_Cigarettes/T_Cigs_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + float4 AlbedoColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color"), + anno::ui_order(32), + anno::in_group("Coloring") + ]], + uniform texture_2d BaseColor = texture_2d("./MI_Cigarettes/T_Cigs_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Base Color"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_color() + ]], + uniform texture_2d RMAM = texture_2d("./MI_Cigarettes/T_Cigs_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMAM"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_masks() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * Tile); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(BaseColor,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(AlbedoColor.x,AlbedoColor.y,AlbedoColor.z) * float3(Local4.x,Local4.y,Local4.z)); + float4 Local6 = tex::lookup_float4(RMAM,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local6.y; + float Specular_mdl = 0.5; + float Roughness_mdl = Local6.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_Cig01/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_Cig01/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Cig01/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_Cig01/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_Cig01/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Cig01/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_Cig01/SM_Cig01.usd b/Goods/Props/Cigarettes/SM_Cig01/SM_Cig01.usd new file mode 100644 index 0000000000000000000000000000000000000000..3c247695a9e986d8a17714306fc6f99f43131e05 Binary files /dev/null and b/Goods/Props/Cigarettes/SM_Cig01/SM_Cig01.usd differ diff --git a/Goods/Props/Cigarettes/SM_Cig02/MI_Cigarettes.mdl b/Goods/Props/Cigarettes/SM_Cig02/MI_Cigarettes.mdl new file mode 100644 index 0000000000000000000000000000000000000000..6cb32ce7659d5d747b5ee2503a2dbdec2d2ae6c9 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Cig02/MI_Cigarettes.mdl @@ -0,0 +1,99 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Cigarettes( + float Tile = 1.0 + [[ + anno::display_name("Tile"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + uniform texture_2d Normal = texture_2d("./MI_Cigarettes/T_Cigs_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + float4 AlbedoColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color"), + anno::ui_order(32), + anno::in_group("Coloring") + ]], + uniform texture_2d BaseColor = texture_2d("./MI_Cigarettes/T_Cigs_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Base Color"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_color() + ]], + uniform texture_2d RMAM = texture_2d("./MI_Cigarettes/T_Cigs_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMAM"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_masks() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * Tile); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(BaseColor,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(AlbedoColor.x,AlbedoColor.y,AlbedoColor.z) * float3(Local4.x,Local4.y,Local4.z)); + float4 Local6 = tex::lookup_float4(RMAM,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local6.y; + float Specular_mdl = 0.5; + float Roughness_mdl = Local6.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_Cig02/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_Cig02/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Cig02/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_Cig02/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_Cig02/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Cig02/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_Cig02/SM_Cig02.usd b/Goods/Props/Cigarettes/SM_Cig02/SM_Cig02.usd new file mode 100644 index 0000000000000000000000000000000000000000..3ff920be4683869ce5d05b3d87c7bff48480b9cd Binary files /dev/null and b/Goods/Props/Cigarettes/SM_Cig02/SM_Cig02.usd differ diff --git a/Goods/Props/Cigarettes/SM_Cig03/MI_Cigarettes.mdl b/Goods/Props/Cigarettes/SM_Cig03/MI_Cigarettes.mdl new file mode 100644 index 0000000000000000000000000000000000000000..6cb32ce7659d5d747b5ee2503a2dbdec2d2ae6c9 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Cig03/MI_Cigarettes.mdl @@ -0,0 +1,99 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Cigarettes( + float Tile = 1.0 + [[ + anno::display_name("Tile"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + uniform texture_2d Normal = texture_2d("./MI_Cigarettes/T_Cigs_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + float4 AlbedoColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color"), + anno::ui_order(32), + anno::in_group("Coloring") + ]], + uniform texture_2d BaseColor = texture_2d("./MI_Cigarettes/T_Cigs_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Base Color"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_color() + ]], + uniform texture_2d RMAM = texture_2d("./MI_Cigarettes/T_Cigs_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMAM"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_masks() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * Tile); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(BaseColor,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(AlbedoColor.x,AlbedoColor.y,AlbedoColor.z) * float3(Local4.x,Local4.y,Local4.z)); + float4 Local6 = tex::lookup_float4(RMAM,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local6.y; + float Specular_mdl = 0.5; + float Roughness_mdl = Local6.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_Cig03/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_Cig03/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Cig03/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_Cig03/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_Cig03/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Cig03/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_Cig03/SM_Cig03.usd b/Goods/Props/Cigarettes/SM_Cig03/SM_Cig03.usd new file mode 100644 index 0000000000000000000000000000000000000000..168209bf7ad8c2dad0e5bb4b3fba62066f05fdea Binary files /dev/null and b/Goods/Props/Cigarettes/SM_Cig03/SM_Cig03.usd differ diff --git a/Goods/Props/Cigarettes/SM_Cig04/MI_Cigarettes.mdl b/Goods/Props/Cigarettes/SM_Cig04/MI_Cigarettes.mdl new file mode 100644 index 0000000000000000000000000000000000000000..6cb32ce7659d5d747b5ee2503a2dbdec2d2ae6c9 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Cig04/MI_Cigarettes.mdl @@ -0,0 +1,99 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Cigarettes( + float Tile = 1.0 + [[ + anno::display_name("Tile"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + uniform texture_2d Normal = texture_2d("./MI_Cigarettes/T_Cigs_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + float4 AlbedoColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color"), + anno::ui_order(32), + anno::in_group("Coloring") + ]], + uniform texture_2d BaseColor = texture_2d("./MI_Cigarettes/T_Cigs_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Base Color"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_color() + ]], + uniform texture_2d RMAM = texture_2d("./MI_Cigarettes/T_Cigs_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMAM"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_masks() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * Tile); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(BaseColor,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(AlbedoColor.x,AlbedoColor.y,AlbedoColor.z) * float3(Local4.x,Local4.y,Local4.z)); + float4 Local6 = tex::lookup_float4(RMAM,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local6.y; + float Specular_mdl = 0.5; + float Roughness_mdl = Local6.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_Cig04/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_Cig04/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Cig04/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_Cig04/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_Cig04/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Cig04/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_Cig04/SM_Cig04.usd b/Goods/Props/Cigarettes/SM_Cig04/SM_Cig04.usd new file mode 100644 index 0000000000000000000000000000000000000000..7293711a357b387122159e7ae1abe9a3de375d5e Binary files /dev/null and b/Goods/Props/Cigarettes/SM_Cig04/SM_Cig04.usd differ diff --git a/Goods/Props/Cigarettes/SM_Cig05/MI_Cigarettes.mdl b/Goods/Props/Cigarettes/SM_Cig05/MI_Cigarettes.mdl new file mode 100644 index 0000000000000000000000000000000000000000..6cb32ce7659d5d747b5ee2503a2dbdec2d2ae6c9 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Cig05/MI_Cigarettes.mdl @@ -0,0 +1,99 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Cigarettes( + float Tile = 1.0 + [[ + anno::display_name("Tile"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + uniform texture_2d Normal = texture_2d("./MI_Cigarettes/T_Cigs_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + float4 AlbedoColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color"), + anno::ui_order(32), + anno::in_group("Coloring") + ]], + uniform texture_2d BaseColor = texture_2d("./MI_Cigarettes/T_Cigs_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Base Color"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_color() + ]], + uniform texture_2d RMAM = texture_2d("./MI_Cigarettes/T_Cigs_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMAM"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_masks() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * Tile); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(BaseColor,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(AlbedoColor.x,AlbedoColor.y,AlbedoColor.z) * float3(Local4.x,Local4.y,Local4.z)); + float4 Local6 = tex::lookup_float4(RMAM,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local6.y; + float Specular_mdl = 0.5; + float Roughness_mdl = Local6.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_Cig05/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_Cig05/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Cig05/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_Cig05/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_Cig05/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Cig05/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_Cig05/SM_Cig05.usd b/Goods/Props/Cigarettes/SM_Cig05/SM_Cig05.usd new file mode 100644 index 0000000000000000000000000000000000000000..fd0610b44d8c5c94b70f1f568f096331c3ec1196 Binary files /dev/null and b/Goods/Props/Cigarettes/SM_Cig05/SM_Cig05.usd differ diff --git a/Goods/Props/Cigarettes/SM_CigBox01/MI_Cigarettes.mdl b/Goods/Props/Cigarettes/SM_CigBox01/MI_Cigarettes.mdl new file mode 100644 index 0000000000000000000000000000000000000000..6cb32ce7659d5d747b5ee2503a2dbdec2d2ae6c9 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigBox01/MI_Cigarettes.mdl @@ -0,0 +1,99 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Cigarettes( + float Tile = 1.0 + [[ + anno::display_name("Tile"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + uniform texture_2d Normal = texture_2d("./MI_Cigarettes/T_Cigs_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + float4 AlbedoColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color"), + anno::ui_order(32), + anno::in_group("Coloring") + ]], + uniform texture_2d BaseColor = texture_2d("./MI_Cigarettes/T_Cigs_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Base Color"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_color() + ]], + uniform texture_2d RMAM = texture_2d("./MI_Cigarettes/T_Cigs_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMAM"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_masks() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * Tile); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(BaseColor,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(AlbedoColor.x,AlbedoColor.y,AlbedoColor.z) * float3(Local4.x,Local4.y,Local4.z)); + float4 Local6 = tex::lookup_float4(RMAM,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local6.y; + float Specular_mdl = 0.5; + float Roughness_mdl = Local6.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_CigBox01/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_CigBox01/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigBox01/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_CigBox01/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_CigBox01/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigBox01/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_CigBox01/SM_CigBox01.usd b/Goods/Props/Cigarettes/SM_CigBox01/SM_CigBox01.usd new file mode 100644 index 0000000000000000000000000000000000000000..fb1421bb4f8fce51e9608bdfc62017af196ebbf7 Binary files /dev/null and b/Goods/Props/Cigarettes/SM_CigBox01/SM_CigBox01.usd differ diff --git a/Goods/Props/Cigarettes/SM_CigBox02/MI_Cigarettes.mdl b/Goods/Props/Cigarettes/SM_CigBox02/MI_Cigarettes.mdl new file mode 100644 index 0000000000000000000000000000000000000000..6cb32ce7659d5d747b5ee2503a2dbdec2d2ae6c9 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigBox02/MI_Cigarettes.mdl @@ -0,0 +1,99 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Cigarettes( + float Tile = 1.0 + [[ + anno::display_name("Tile"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + uniform texture_2d Normal = texture_2d("./MI_Cigarettes/T_Cigs_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + float4 AlbedoColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color"), + anno::ui_order(32), + anno::in_group("Coloring") + ]], + uniform texture_2d BaseColor = texture_2d("./MI_Cigarettes/T_Cigs_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Base Color"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_color() + ]], + uniform texture_2d RMAM = texture_2d("./MI_Cigarettes/T_Cigs_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMAM"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_masks() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * Tile); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(BaseColor,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(AlbedoColor.x,AlbedoColor.y,AlbedoColor.z) * float3(Local4.x,Local4.y,Local4.z)); + float4 Local6 = tex::lookup_float4(RMAM,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local6.y; + float Specular_mdl = 0.5; + float Roughness_mdl = Local6.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_CigBox02/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_CigBox02/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigBox02/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_CigBox02/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_CigBox02/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigBox02/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_CigBox02/SM_CigBox02.usd b/Goods/Props/Cigarettes/SM_CigBox02/SM_CigBox02.usd new file mode 100644 index 0000000000000000000000000000000000000000..7b78c5115129ab536fc5af19185bb452a637cc0d Binary files /dev/null and b/Goods/Props/Cigarettes/SM_CigBox02/SM_CigBox02.usd differ diff --git a/Goods/Props/Cigarettes/SM_CigBox03/MI_Cigarettes.mdl b/Goods/Props/Cigarettes/SM_CigBox03/MI_Cigarettes.mdl new file mode 100644 index 0000000000000000000000000000000000000000..6cb32ce7659d5d747b5ee2503a2dbdec2d2ae6c9 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigBox03/MI_Cigarettes.mdl @@ -0,0 +1,99 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Cigarettes( + float Tile = 1.0 + [[ + anno::display_name("Tile"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + uniform texture_2d Normal = texture_2d("./MI_Cigarettes/T_Cigs_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + float4 AlbedoColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color"), + anno::ui_order(32), + anno::in_group("Coloring") + ]], + uniform texture_2d BaseColor = texture_2d("./MI_Cigarettes/T_Cigs_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Base Color"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_color() + ]], + uniform texture_2d RMAM = texture_2d("./MI_Cigarettes/T_Cigs_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMAM"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_masks() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * Tile); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(BaseColor,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(AlbedoColor.x,AlbedoColor.y,AlbedoColor.z) * float3(Local4.x,Local4.y,Local4.z)); + float4 Local6 = tex::lookup_float4(RMAM,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local6.y; + float Specular_mdl = 0.5; + float Roughness_mdl = Local6.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_CigBox03/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_CigBox03/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigBox03/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_CigBox03/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_CigBox03/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigBox03/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_CigBox03/SM_CigBox03.usd b/Goods/Props/Cigarettes/SM_CigBox03/SM_CigBox03.usd new file mode 100644 index 0000000000000000000000000000000000000000..175e7eace25c61afe25bb85c9acec4f6b49dd075 Binary files /dev/null and b/Goods/Props/Cigarettes/SM_CigBox03/SM_CigBox03.usd differ diff --git a/Goods/Props/Cigarettes/SM_CigBox04/MI_Cigarettes.mdl b/Goods/Props/Cigarettes/SM_CigBox04/MI_Cigarettes.mdl new file mode 100644 index 0000000000000000000000000000000000000000..6cb32ce7659d5d747b5ee2503a2dbdec2d2ae6c9 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigBox04/MI_Cigarettes.mdl @@ -0,0 +1,99 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Cigarettes( + float Tile = 1.0 + [[ + anno::display_name("Tile"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + uniform texture_2d Normal = texture_2d("./MI_Cigarettes/T_Cigs_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + float4 AlbedoColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color"), + anno::ui_order(32), + anno::in_group("Coloring") + ]], + uniform texture_2d BaseColor = texture_2d("./MI_Cigarettes/T_Cigs_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Base Color"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_color() + ]], + uniform texture_2d RMAM = texture_2d("./MI_Cigarettes/T_Cigs_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMAM"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_masks() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * Tile); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(BaseColor,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(AlbedoColor.x,AlbedoColor.y,AlbedoColor.z) * float3(Local4.x,Local4.y,Local4.z)); + float4 Local6 = tex::lookup_float4(RMAM,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local6.y; + float Specular_mdl = 0.5; + float Roughness_mdl = Local6.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_CigBox04/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_CigBox04/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigBox04/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_CigBox04/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_CigBox04/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigBox04/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_CigBox04/SM_CigBox04.usd b/Goods/Props/Cigarettes/SM_CigBox04/SM_CigBox04.usd new file mode 100644 index 0000000000000000000000000000000000000000..6176270dd6f229f9300dbd7bfb6493fec251dc8e Binary files /dev/null and b/Goods/Props/Cigarettes/SM_CigBox04/SM_CigBox04.usd differ diff --git a/Goods/Props/Cigarettes/SM_CigBox05/MI_Cigarettes.mdl b/Goods/Props/Cigarettes/SM_CigBox05/MI_Cigarettes.mdl new file mode 100644 index 0000000000000000000000000000000000000000..6cb32ce7659d5d747b5ee2503a2dbdec2d2ae6c9 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigBox05/MI_Cigarettes.mdl @@ -0,0 +1,99 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Cigarettes( + float Tile = 1.0 + [[ + anno::display_name("Tile"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + uniform texture_2d Normal = texture_2d("./MI_Cigarettes/T_Cigs_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + float4 AlbedoColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color"), + anno::ui_order(32), + anno::in_group("Coloring") + ]], + uniform texture_2d BaseColor = texture_2d("./MI_Cigarettes/T_Cigs_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Base Color"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_color() + ]], + uniform texture_2d RMAM = texture_2d("./MI_Cigarettes/T_Cigs_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMAM"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_masks() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * Tile); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(BaseColor,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(AlbedoColor.x,AlbedoColor.y,AlbedoColor.z) * float3(Local4.x,Local4.y,Local4.z)); + float4 Local6 = tex::lookup_float4(RMAM,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local6.y; + float Specular_mdl = 0.5; + float Roughness_mdl = Local6.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_CigBox05/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_CigBox05/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigBox05/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_CigBox05/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_CigBox05/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigBox05/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_CigBox05/SM_CigBox05.usd b/Goods/Props/Cigarettes/SM_CigBox05/SM_CigBox05.usd new file mode 100644 index 0000000000000000000000000000000000000000..984ea34e914a020b2e70ca192d5eac91df58df40 Binary files /dev/null and b/Goods/Props/Cigarettes/SM_CigBox05/SM_CigBox05.usd differ diff --git a/Goods/Props/Cigarettes/SM_CigMulti01/MI_Cigarettes.mdl b/Goods/Props/Cigarettes/SM_CigMulti01/MI_Cigarettes.mdl new file mode 100644 index 0000000000000000000000000000000000000000..6cb32ce7659d5d747b5ee2503a2dbdec2d2ae6c9 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigMulti01/MI_Cigarettes.mdl @@ -0,0 +1,99 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Cigarettes( + float Tile = 1.0 + [[ + anno::display_name("Tile"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + uniform texture_2d Normal = texture_2d("./MI_Cigarettes/T_Cigs_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + float4 AlbedoColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color"), + anno::ui_order(32), + anno::in_group("Coloring") + ]], + uniform texture_2d BaseColor = texture_2d("./MI_Cigarettes/T_Cigs_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Base Color"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_color() + ]], + uniform texture_2d RMAM = texture_2d("./MI_Cigarettes/T_Cigs_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMAM"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_masks() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * Tile); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(BaseColor,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(AlbedoColor.x,AlbedoColor.y,AlbedoColor.z) * float3(Local4.x,Local4.y,Local4.z)); + float4 Local6 = tex::lookup_float4(RMAM,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local6.y; + float Specular_mdl = 0.5; + float Roughness_mdl = Local6.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_CigMulti01/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_CigMulti01/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigMulti01/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_CigMulti01/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_CigMulti01/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigMulti01/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_CigMulti01/SM_CigMulti01.usd b/Goods/Props/Cigarettes/SM_CigMulti01/SM_CigMulti01.usd new file mode 100644 index 0000000000000000000000000000000000000000..c9b0d7749131ef99c5cf18f25b4ca39da5094ee1 Binary files /dev/null and b/Goods/Props/Cigarettes/SM_CigMulti01/SM_CigMulti01.usd differ diff --git a/Goods/Props/Cigarettes/SM_CigMulti02/MI_Cigarettes.mdl b/Goods/Props/Cigarettes/SM_CigMulti02/MI_Cigarettes.mdl new file mode 100644 index 0000000000000000000000000000000000000000..6cb32ce7659d5d747b5ee2503a2dbdec2d2ae6c9 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigMulti02/MI_Cigarettes.mdl @@ -0,0 +1,99 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Cigarettes( + float Tile = 1.0 + [[ + anno::display_name("Tile"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + uniform texture_2d Normal = texture_2d("./MI_Cigarettes/T_Cigs_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + float4 AlbedoColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color"), + anno::ui_order(32), + anno::in_group("Coloring") + ]], + uniform texture_2d BaseColor = texture_2d("./MI_Cigarettes/T_Cigs_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Base Color"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_color() + ]], + uniform texture_2d RMAM = texture_2d("./MI_Cigarettes/T_Cigs_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMAM"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_masks() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * Tile); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(BaseColor,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(AlbedoColor.x,AlbedoColor.y,AlbedoColor.z) * float3(Local4.x,Local4.y,Local4.z)); + float4 Local6 = tex::lookup_float4(RMAM,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local6.y; + float Specular_mdl = 0.5; + float Roughness_mdl = Local6.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_CigMulti02/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_CigMulti02/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigMulti02/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_CigMulti02/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_CigMulti02/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigMulti02/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_CigMulti02/SM_CigMulti02.usd b/Goods/Props/Cigarettes/SM_CigMulti02/SM_CigMulti02.usd new file mode 100644 index 0000000000000000000000000000000000000000..60029337db9fd6efdfd331e5591e233d31b0d5f5 Binary files /dev/null and b/Goods/Props/Cigarettes/SM_CigMulti02/SM_CigMulti02.usd differ diff --git a/Goods/Props/Cigarettes/SM_CigMulti03/MI_Cigarettes.mdl b/Goods/Props/Cigarettes/SM_CigMulti03/MI_Cigarettes.mdl new file mode 100644 index 0000000000000000000000000000000000000000..6cb32ce7659d5d747b5ee2503a2dbdec2d2ae6c9 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigMulti03/MI_Cigarettes.mdl @@ -0,0 +1,99 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Cigarettes( + float Tile = 1.0 + [[ + anno::display_name("Tile"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + uniform texture_2d Normal = texture_2d("./MI_Cigarettes/T_Cigs_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + float4 AlbedoColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color"), + anno::ui_order(32), + anno::in_group("Coloring") + ]], + uniform texture_2d BaseColor = texture_2d("./MI_Cigarettes/T_Cigs_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Base Color"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_color() + ]], + uniform texture_2d RMAM = texture_2d("./MI_Cigarettes/T_Cigs_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMAM"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_masks() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * Tile); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(BaseColor,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(AlbedoColor.x,AlbedoColor.y,AlbedoColor.z) * float3(Local4.x,Local4.y,Local4.z)); + float4 Local6 = tex::lookup_float4(RMAM,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local6.y; + float Specular_mdl = 0.5; + float Roughness_mdl = Local6.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_CigMulti03/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_CigMulti03/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigMulti03/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_CigMulti03/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_CigMulti03/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigMulti03/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_CigMulti03/SM_CigMulti03.usd b/Goods/Props/Cigarettes/SM_CigMulti03/SM_CigMulti03.usd new file mode 100644 index 0000000000000000000000000000000000000000..211a574eead86b98a8f5df3965f8eda1a6b6b6cd Binary files /dev/null and b/Goods/Props/Cigarettes/SM_CigMulti03/SM_CigMulti03.usd differ diff --git a/Goods/Props/Cigarettes/SM_CigMulti04/MI_Cigarettes.mdl b/Goods/Props/Cigarettes/SM_CigMulti04/MI_Cigarettes.mdl new file mode 100644 index 0000000000000000000000000000000000000000..6cb32ce7659d5d747b5ee2503a2dbdec2d2ae6c9 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigMulti04/MI_Cigarettes.mdl @@ -0,0 +1,99 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Cigarettes( + float Tile = 1.0 + [[ + anno::display_name("Tile"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + uniform texture_2d Normal = texture_2d("./MI_Cigarettes/T_Cigs_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + float4 AlbedoColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color"), + anno::ui_order(32), + anno::in_group("Coloring") + ]], + uniform texture_2d BaseColor = texture_2d("./MI_Cigarettes/T_Cigs_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Base Color"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_color() + ]], + uniform texture_2d RMAM = texture_2d("./MI_Cigarettes/T_Cigs_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMAM"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_masks() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * Tile); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(BaseColor,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(AlbedoColor.x,AlbedoColor.y,AlbedoColor.z) * float3(Local4.x,Local4.y,Local4.z)); + float4 Local6 = tex::lookup_float4(RMAM,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local6.y; + float Specular_mdl = 0.5; + float Roughness_mdl = Local6.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_CigMulti04/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_CigMulti04/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigMulti04/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_CigMulti04/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_CigMulti04/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigMulti04/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_CigMulti04/SM_CigMulti04.usd b/Goods/Props/Cigarettes/SM_CigMulti04/SM_CigMulti04.usd new file mode 100644 index 0000000000000000000000000000000000000000..114ccfd56127170548e046fa650ba000ffe8e5e3 Binary files /dev/null and b/Goods/Props/Cigarettes/SM_CigMulti04/SM_CigMulti04.usd differ diff --git a/Goods/Props/Cigarettes/SM_CigMulti05/MI_Cigarettes.mdl b/Goods/Props/Cigarettes/SM_CigMulti05/MI_Cigarettes.mdl new file mode 100644 index 0000000000000000000000000000000000000000..6cb32ce7659d5d747b5ee2503a2dbdec2d2ae6c9 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigMulti05/MI_Cigarettes.mdl @@ -0,0 +1,99 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Cigarettes( + float Tile = 1.0 + [[ + anno::display_name("Tile"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + uniform texture_2d Normal = texture_2d("./MI_Cigarettes/T_Cigs_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + float4 AlbedoColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color"), + anno::ui_order(32), + anno::in_group("Coloring") + ]], + uniform texture_2d BaseColor = texture_2d("./MI_Cigarettes/T_Cigs_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Base Color"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_color() + ]], + uniform texture_2d RMAM = texture_2d("./MI_Cigarettes/T_Cigs_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMAM"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_masks() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * Tile); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(BaseColor,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(AlbedoColor.x,AlbedoColor.y,AlbedoColor.z) * float3(Local4.x,Local4.y,Local4.z)); + float4 Local6 = tex::lookup_float4(RMAM,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local6.y; + float Specular_mdl = 0.5; + float Roughness_mdl = Local6.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_CigMulti05/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_CigMulti05/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigMulti05/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_CigMulti05/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_CigMulti05/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_CigMulti05/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_CigMulti05/SM_CigMulti05.usd b/Goods/Props/Cigarettes/SM_CigMulti05/SM_CigMulti05.usd new file mode 100644 index 0000000000000000000000000000000000000000..be48a0d43383f6ab4828c28167714757d81f177a Binary files /dev/null and b/Goods/Props/Cigarettes/SM_CigMulti05/SM_CigMulti05.usd differ diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01d/MI_Shelves_Cigarettes_NN_01a.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01d/MI_Shelves_Cigarettes_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..f9ad50a32aeb846f3d658df531506e28ca9deafa --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01d/MI_Shelves_Cigarettes_NN_01a.mdl @@ -0,0 +1,147 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Shelves_Cigarettes_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float4 BaseColorTint_Red_ = float4(1.0,0.0,0.0,1.0) + [[ + anno::display_name("Base Color Tint (Red)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d AlbedoMultiTintMask = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_M.png",::tex::gamma_linear) + [[ + anno::display_name("Albedo Multi Tint Mask "), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float TintMaskMulti = 1.0 + [[ + anno::display_name("Tint Mask Multi"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float TintMaskContrast = 1.0 + [[ + anno::display_name("Tint Mask Contrast"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float4 BaseColorTint_Green_ = float4(0.9375,1.0,1.0,1.0) + [[ + anno::display_name("Base Color Tint (Green)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float3 Local6 = (float3(Local4.x,Local4.y,Local4.z) * float3(BaseColorTint_Red_.x,BaseColorTint_Red_.y,BaseColorTint_Red_.z)); + float4 Local7 = tex::lookup_float4(AlbedoMultiTintMask,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local8 = (Local7 * TintMaskMulti); + float4 Local9 = math::pow(math::max(Local8,float4(0.000001)),float4(TintMaskContrast,TintMaskContrast,TintMaskContrast,TintMaskContrast)); + float4 Local10 = math::min(math::max(Local9,float4(0.0,0.0,0.0,0.0)),float4(1.0,1.0,1.0,1.0)); + float3 Local11 = math::lerp(Local5,Local6,Local10.x); + float3 Local12 = (float3(Local4.x,Local4.y,Local4.z) * float3(BaseColorTint_Green_.x,BaseColorTint_Green_.y,BaseColorTint_Green_.z)); + float3 Local13 = math::lerp(Local11,Local12,Local10.y); + float4 Local14 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local15 = (Local14.y * MetalnessValue); + float Local16 = math::saturate(Local15); + float Local17 = (Local14.z * 0.5); + float Local18 = math::min(math::max(Local14.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local13; + float Metallic_mdl = Local16; + float Specular_mdl = Local17; + float Roughness_mdl = Local18; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01d/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01d/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01d/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01d/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01d/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01d/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01d/SM_Shelves_Cigarettes_NN_01d.usd b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01d/SM_Shelves_Cigarettes_NN_01d.usd new file mode 100644 index 0000000000000000000000000000000000000000..45cc66f12281774cd952f7d1e36c50a8a324d1f7 Binary files /dev/null and b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01d/SM_Shelves_Cigarettes_NN_01d.usd differ diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01e/MI_Shelves_Cigarettes_NN_01a.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01e/MI_Shelves_Cigarettes_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..f9ad50a32aeb846f3d658df531506e28ca9deafa --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01e/MI_Shelves_Cigarettes_NN_01a.mdl @@ -0,0 +1,147 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Shelves_Cigarettes_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float4 BaseColorTint_Red_ = float4(1.0,0.0,0.0,1.0) + [[ + anno::display_name("Base Color Tint (Red)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d AlbedoMultiTintMask = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_M.png",::tex::gamma_linear) + [[ + anno::display_name("Albedo Multi Tint Mask "), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float TintMaskMulti = 1.0 + [[ + anno::display_name("Tint Mask Multi"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float TintMaskContrast = 1.0 + [[ + anno::display_name("Tint Mask Contrast"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float4 BaseColorTint_Green_ = float4(0.9375,1.0,1.0,1.0) + [[ + anno::display_name("Base Color Tint (Green)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float3 Local6 = (float3(Local4.x,Local4.y,Local4.z) * float3(BaseColorTint_Red_.x,BaseColorTint_Red_.y,BaseColorTint_Red_.z)); + float4 Local7 = tex::lookup_float4(AlbedoMultiTintMask,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local8 = (Local7 * TintMaskMulti); + float4 Local9 = math::pow(math::max(Local8,float4(0.000001)),float4(TintMaskContrast,TintMaskContrast,TintMaskContrast,TintMaskContrast)); + float4 Local10 = math::min(math::max(Local9,float4(0.0,0.0,0.0,0.0)),float4(1.0,1.0,1.0,1.0)); + float3 Local11 = math::lerp(Local5,Local6,Local10.x); + float3 Local12 = (float3(Local4.x,Local4.y,Local4.z) * float3(BaseColorTint_Green_.x,BaseColorTint_Green_.y,BaseColorTint_Green_.z)); + float3 Local13 = math::lerp(Local11,Local12,Local10.y); + float4 Local14 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local15 = (Local14.y * MetalnessValue); + float Local16 = math::saturate(Local15); + float Local17 = (Local14.z * 0.5); + float Local18 = math::min(math::max(Local14.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local13; + float Metallic_mdl = Local16; + float Specular_mdl = Local17; + float Roughness_mdl = Local18; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01e/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01e/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01e/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01e/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01e/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01e/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01e/SM_Shelves_Cigarettes_NN_01e.usd b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01e/SM_Shelves_Cigarettes_NN_01e.usd new file mode 100644 index 0000000000000000000000000000000000000000..884223f2a7a374c9c337c0abe1a48dd190d7b574 Binary files /dev/null and b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01e/SM_Shelves_Cigarettes_NN_01e.usd differ diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01f/MI_Shelves_Cigarettes_NN_01a.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01f/MI_Shelves_Cigarettes_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..f9ad50a32aeb846f3d658df531506e28ca9deafa --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01f/MI_Shelves_Cigarettes_NN_01a.mdl @@ -0,0 +1,147 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Shelves_Cigarettes_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float4 BaseColorTint_Red_ = float4(1.0,0.0,0.0,1.0) + [[ + anno::display_name("Base Color Tint (Red)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d AlbedoMultiTintMask = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_M.png",::tex::gamma_linear) + [[ + anno::display_name("Albedo Multi Tint Mask "), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float TintMaskMulti = 1.0 + [[ + anno::display_name("Tint Mask Multi"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float TintMaskContrast = 1.0 + [[ + anno::display_name("Tint Mask Contrast"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float4 BaseColorTint_Green_ = float4(0.9375,1.0,1.0,1.0) + [[ + anno::display_name("Base Color Tint (Green)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float3 Local6 = (float3(Local4.x,Local4.y,Local4.z) * float3(BaseColorTint_Red_.x,BaseColorTint_Red_.y,BaseColorTint_Red_.z)); + float4 Local7 = tex::lookup_float4(AlbedoMultiTintMask,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local8 = (Local7 * TintMaskMulti); + float4 Local9 = math::pow(math::max(Local8,float4(0.000001)),float4(TintMaskContrast,TintMaskContrast,TintMaskContrast,TintMaskContrast)); + float4 Local10 = math::min(math::max(Local9,float4(0.0,0.0,0.0,0.0)),float4(1.0,1.0,1.0,1.0)); + float3 Local11 = math::lerp(Local5,Local6,Local10.x); + float3 Local12 = (float3(Local4.x,Local4.y,Local4.z) * float3(BaseColorTint_Green_.x,BaseColorTint_Green_.y,BaseColorTint_Green_.z)); + float3 Local13 = math::lerp(Local11,Local12,Local10.y); + float4 Local14 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local15 = (Local14.y * MetalnessValue); + float Local16 = math::saturate(Local15); + float Local17 = (Local14.z * 0.5); + float Local18 = math::min(math::max(Local14.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local13; + float Metallic_mdl = Local16; + float Specular_mdl = Local17; + float Roughness_mdl = Local18; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01f/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01f/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01f/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01f/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01f/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01f/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01g/MI_Shelves_Cigarettes_NN_01a.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01g/MI_Shelves_Cigarettes_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..f9ad50a32aeb846f3d658df531506e28ca9deafa --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01g/MI_Shelves_Cigarettes_NN_01a.mdl @@ -0,0 +1,147 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Shelves_Cigarettes_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float4 BaseColorTint_Red_ = float4(1.0,0.0,0.0,1.0) + [[ + anno::display_name("Base Color Tint (Red)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d AlbedoMultiTintMask = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_M.png",::tex::gamma_linear) + [[ + anno::display_name("Albedo Multi Tint Mask "), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float TintMaskMulti = 1.0 + [[ + anno::display_name("Tint Mask Multi"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float TintMaskContrast = 1.0 + [[ + anno::display_name("Tint Mask Contrast"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float4 BaseColorTint_Green_ = float4(0.9375,1.0,1.0,1.0) + [[ + anno::display_name("Base Color Tint (Green)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float3 Local6 = (float3(Local4.x,Local4.y,Local4.z) * float3(BaseColorTint_Red_.x,BaseColorTint_Red_.y,BaseColorTint_Red_.z)); + float4 Local7 = tex::lookup_float4(AlbedoMultiTintMask,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local8 = (Local7 * TintMaskMulti); + float4 Local9 = math::pow(math::max(Local8,float4(0.000001)),float4(TintMaskContrast,TintMaskContrast,TintMaskContrast,TintMaskContrast)); + float4 Local10 = math::min(math::max(Local9,float4(0.0,0.0,0.0,0.0)),float4(1.0,1.0,1.0,1.0)); + float3 Local11 = math::lerp(Local5,Local6,Local10.x); + float3 Local12 = (float3(Local4.x,Local4.y,Local4.z) * float3(BaseColorTint_Green_.x,BaseColorTint_Green_.y,BaseColorTint_Green_.z)); + float3 Local13 = math::lerp(Local11,Local12,Local10.y); + float4 Local14 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local15 = (Local14.y * MetalnessValue); + float Local16 = math::saturate(Local15); + float Local17 = (Local14.z * 0.5); + float Local18 = math::min(math::max(Local14.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local13; + float Metallic_mdl = Local16; + float Specular_mdl = Local17; + float Roughness_mdl = Local18; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01g/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01g/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01g/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01g/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01g/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01g/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01h/MI_Shelves_Cigarettes_NN_01a.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01h/MI_Shelves_Cigarettes_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..f9ad50a32aeb846f3d658df531506e28ca9deafa --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01h/MI_Shelves_Cigarettes_NN_01a.mdl @@ -0,0 +1,147 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Shelves_Cigarettes_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float4 BaseColorTint_Red_ = float4(1.0,0.0,0.0,1.0) + [[ + anno::display_name("Base Color Tint (Red)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d AlbedoMultiTintMask = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_M.png",::tex::gamma_linear) + [[ + anno::display_name("Albedo Multi Tint Mask "), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float TintMaskMulti = 1.0 + [[ + anno::display_name("Tint Mask Multi"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float TintMaskContrast = 1.0 + [[ + anno::display_name("Tint Mask Contrast"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float4 BaseColorTint_Green_ = float4(0.9375,1.0,1.0,1.0) + [[ + anno::display_name("Base Color Tint (Green)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float3 Local6 = (float3(Local4.x,Local4.y,Local4.z) * float3(BaseColorTint_Red_.x,BaseColorTint_Red_.y,BaseColorTint_Red_.z)); + float4 Local7 = tex::lookup_float4(AlbedoMultiTintMask,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local8 = (Local7 * TintMaskMulti); + float4 Local9 = math::pow(math::max(Local8,float4(0.000001)),float4(TintMaskContrast,TintMaskContrast,TintMaskContrast,TintMaskContrast)); + float4 Local10 = math::min(math::max(Local9,float4(0.0,0.0,0.0,0.0)),float4(1.0,1.0,1.0,1.0)); + float3 Local11 = math::lerp(Local5,Local6,Local10.x); + float3 Local12 = (float3(Local4.x,Local4.y,Local4.z) * float3(BaseColorTint_Green_.x,BaseColorTint_Green_.y,BaseColorTint_Green_.z)); + float3 Local13 = math::lerp(Local11,Local12,Local10.y); + float4 Local14 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local15 = (Local14.y * MetalnessValue); + float Local16 = math::saturate(Local15); + float Local17 = (Local14.z * 0.5); + float Local18 = math::min(math::max(Local14.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local13; + float Metallic_mdl = Local16; + float Specular_mdl = Local17; + float Roughness_mdl = Local18; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01h/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01h/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01h/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01h/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01h/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01h/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01h/SM_Shelves_Cigarettes_NN_01h.usd b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01h/SM_Shelves_Cigarettes_NN_01h.usd new file mode 100644 index 0000000000000000000000000000000000000000..f76e0f44526574a333e7814db14f0516aaab04c7 Binary files /dev/null and b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01h/SM_Shelves_Cigarettes_NN_01h.usd differ diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01i/MI_Shelves_Cigarettes_NN_01a.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01i/MI_Shelves_Cigarettes_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..f9ad50a32aeb846f3d658df531506e28ca9deafa --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01i/MI_Shelves_Cigarettes_NN_01a.mdl @@ -0,0 +1,147 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Shelves_Cigarettes_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float4 BaseColorTint_Red_ = float4(1.0,0.0,0.0,1.0) + [[ + anno::display_name("Base Color Tint (Red)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d AlbedoMultiTintMask = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_M.png",::tex::gamma_linear) + [[ + anno::display_name("Albedo Multi Tint Mask "), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float TintMaskMulti = 1.0 + [[ + anno::display_name("Tint Mask Multi"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float TintMaskContrast = 1.0 + [[ + anno::display_name("Tint Mask Contrast"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float4 BaseColorTint_Green_ = float4(0.9375,1.0,1.0,1.0) + [[ + anno::display_name("Base Color Tint (Green)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float3 Local6 = (float3(Local4.x,Local4.y,Local4.z) * float3(BaseColorTint_Red_.x,BaseColorTint_Red_.y,BaseColorTint_Red_.z)); + float4 Local7 = tex::lookup_float4(AlbedoMultiTintMask,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local8 = (Local7 * TintMaskMulti); + float4 Local9 = math::pow(math::max(Local8,float4(0.000001)),float4(TintMaskContrast,TintMaskContrast,TintMaskContrast,TintMaskContrast)); + float4 Local10 = math::min(math::max(Local9,float4(0.0,0.0,0.0,0.0)),float4(1.0,1.0,1.0,1.0)); + float3 Local11 = math::lerp(Local5,Local6,Local10.x); + float3 Local12 = (float3(Local4.x,Local4.y,Local4.z) * float3(BaseColorTint_Green_.x,BaseColorTint_Green_.y,BaseColorTint_Green_.z)); + float3 Local13 = math::lerp(Local11,Local12,Local10.y); + float4 Local14 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local15 = (Local14.y * MetalnessValue); + float Local16 = math::saturate(Local15); + float Local17 = (Local14.z * 0.5); + float Local18 = math::min(math::max(Local14.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local13; + float Metallic_mdl = Local16; + float Specular_mdl = Local17; + float Roughness_mdl = Local18; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01i/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01i/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01i/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01i/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01i/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01i/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01j/MI_Shelves_Cigarettes_NN_01a.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01j/MI_Shelves_Cigarettes_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..f9ad50a32aeb846f3d658df531506e28ca9deafa --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01j/MI_Shelves_Cigarettes_NN_01a.mdl @@ -0,0 +1,147 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Shelves_Cigarettes_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float4 BaseColorTint_Red_ = float4(1.0,0.0,0.0,1.0) + [[ + anno::display_name("Base Color Tint (Red)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d AlbedoMultiTintMask = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_M.png",::tex::gamma_linear) + [[ + anno::display_name("Albedo Multi Tint Mask "), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float TintMaskMulti = 1.0 + [[ + anno::display_name("Tint Mask Multi"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float TintMaskContrast = 1.0 + [[ + anno::display_name("Tint Mask Contrast"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float4 BaseColorTint_Green_ = float4(0.9375,1.0,1.0,1.0) + [[ + anno::display_name("Base Color Tint (Green)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float3 Local6 = (float3(Local4.x,Local4.y,Local4.z) * float3(BaseColorTint_Red_.x,BaseColorTint_Red_.y,BaseColorTint_Red_.z)); + float4 Local7 = tex::lookup_float4(AlbedoMultiTintMask,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local8 = (Local7 * TintMaskMulti); + float4 Local9 = math::pow(math::max(Local8,float4(0.000001)),float4(TintMaskContrast,TintMaskContrast,TintMaskContrast,TintMaskContrast)); + float4 Local10 = math::min(math::max(Local9,float4(0.0,0.0,0.0,0.0)),float4(1.0,1.0,1.0,1.0)); + float3 Local11 = math::lerp(Local5,Local6,Local10.x); + float3 Local12 = (float3(Local4.x,Local4.y,Local4.z) * float3(BaseColorTint_Green_.x,BaseColorTint_Green_.y,BaseColorTint_Green_.z)); + float3 Local13 = math::lerp(Local11,Local12,Local10.y); + float4 Local14 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local15 = (Local14.y * MetalnessValue); + float Local16 = math::saturate(Local15); + float Local17 = (Local14.z * 0.5); + float Local18 = math::min(math::max(Local14.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local13; + float Metallic_mdl = Local16; + float Specular_mdl = Local17; + float Roughness_mdl = Local18; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01j/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01j/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01j/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01j/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01j/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01j/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01j/SM_Shelves_Cigarettes_NN_01j.usd b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01j/SM_Shelves_Cigarettes_NN_01j.usd new file mode 100644 index 0000000000000000000000000000000000000000..5c57e0a3a98933fb10265962364255ff5aaa6e59 Binary files /dev/null and b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01j/SM_Shelves_Cigarettes_NN_01j.usd differ diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01k/MI_Shelves_Cigarettes_NN_01a.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01k/MI_Shelves_Cigarettes_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..f9ad50a32aeb846f3d658df531506e28ca9deafa --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01k/MI_Shelves_Cigarettes_NN_01a.mdl @@ -0,0 +1,147 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Shelves_Cigarettes_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float4 BaseColorTint_Red_ = float4(1.0,0.0,0.0,1.0) + [[ + anno::display_name("Base Color Tint (Red)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d AlbedoMultiTintMask = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_M.png",::tex::gamma_linear) + [[ + anno::display_name("Albedo Multi Tint Mask "), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float TintMaskMulti = 1.0 + [[ + anno::display_name("Tint Mask Multi"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float TintMaskContrast = 1.0 + [[ + anno::display_name("Tint Mask Contrast"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + float4 BaseColorTint_Green_ = float4(0.9375,1.0,1.0,1.0) + [[ + anno::display_name("Base Color Tint (Green)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Shelves_Cigarettes_NN_01a/TX_Shelves_Cigarettes_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float3 Local6 = (float3(Local4.x,Local4.y,Local4.z) * float3(BaseColorTint_Red_.x,BaseColorTint_Red_.y,BaseColorTint_Red_.z)); + float4 Local7 = tex::lookup_float4(AlbedoMultiTintMask,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local8 = (Local7 * TintMaskMulti); + float4 Local9 = math::pow(math::max(Local8,float4(0.000001)),float4(TintMaskContrast,TintMaskContrast,TintMaskContrast,TintMaskContrast)); + float4 Local10 = math::min(math::max(Local9,float4(0.0,0.0,0.0,0.0)),float4(1.0,1.0,1.0,1.0)); + float3 Local11 = math::lerp(Local5,Local6,Local10.x); + float3 Local12 = (float3(Local4.x,Local4.y,Local4.z) * float3(BaseColorTint_Green_.x,BaseColorTint_Green_.y,BaseColorTint_Green_.z)); + float3 Local13 = math::lerp(Local11,Local12,Local10.y); + float4 Local14 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local15 = (Local14.y * MetalnessValue); + float Local16 = math::saturate(Local15); + float Local17 = (Local14.z * 0.5); + float Local18 = math::min(math::max(Local14.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local13; + float Metallic_mdl = Local16; + float Specular_mdl = Local17; + float Roughness_mdl = Local18; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01k/OmniUe4Base.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01k/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01k/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01k/OmniUe4Function.mdl b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01k/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Cigarettes/SM_Shelves_Cigarettes_NN_01k/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Doors/SM_DoorMain/M_Doors2/T_Doors2_Normal_OpenGL.png b/Goods/Props/Doors/SM_DoorMain/M_Doors2/T_Doors2_Normal_OpenGL.png new file mode 100644 index 0000000000000000000000000000000000000000..2c5ff00553e396ad70b5857a8bcf976361f1129d --- /dev/null +++ b/Goods/Props/Doors/SM_DoorMain/M_Doors2/T_Doors2_Normal_OpenGL.png @@ -0,0 +1,3 @@ +version https://git-lfs.github.com/spec/v1 +oid sha256:1ff5be908b3b0303efe37b518954f1f67e69c9bc51ebe9a9c589c1d3c28139bc +size 52411440 diff --git a/Goods/Props/Doors/SM_DoorSingleLeft_1/M_Doors2/T_Doors2_Base_Color.png b/Goods/Props/Doors/SM_DoorSingleLeft_1/M_Doors2/T_Doors2_Base_Color.png new file mode 100644 index 0000000000000000000000000000000000000000..e5da7baf5d1bd0d7939653ce8ece09cd5b3d2774 --- /dev/null +++ b/Goods/Props/Doors/SM_DoorSingleLeft_1/M_Doors2/T_Doors2_Base_Color.png @@ -0,0 +1,3 @@ +version https://git-lfs.github.com/spec/v1 +oid sha256:f172c9b44fd41281daaef108f976b103c0be2220a5749df12fc179fba987258c +size 13299424 diff --git a/Goods/Props/Doors/SM_DoorSingleLeft_2/M_Doors2/T_Doors2_Base_Color.png b/Goods/Props/Doors/SM_DoorSingleLeft_2/M_Doors2/T_Doors2_Base_Color.png new file mode 100644 index 0000000000000000000000000000000000000000..e5da7baf5d1bd0d7939653ce8ece09cd5b3d2774 --- /dev/null +++ b/Goods/Props/Doors/SM_DoorSingleLeft_2/M_Doors2/T_Doors2_Base_Color.png @@ -0,0 +1,3 @@ +version https://git-lfs.github.com/spec/v1 +oid sha256:f172c9b44fd41281daaef108f976b103c0be2220a5749df12fc179fba987258c +size 13299424 diff --git a/Goods/Props/Doors/SM_DoorSingleRight_1/M_Doors2/T_Doors2_Normal_OpenGL.png b/Goods/Props/Doors/SM_DoorSingleRight_1/M_Doors2/T_Doors2_Normal_OpenGL.png new file mode 100644 index 0000000000000000000000000000000000000000..2c5ff00553e396ad70b5857a8bcf976361f1129d --- /dev/null +++ b/Goods/Props/Doors/SM_DoorSingleRight_1/M_Doors2/T_Doors2_Normal_OpenGL.png @@ -0,0 +1,3 @@ +version https://git-lfs.github.com/spec/v1 +oid sha256:1ff5be908b3b0303efe37b518954f1f67e69c9bc51ebe9a9c589c1d3c28139bc +size 52411440 diff --git a/Goods/Props/Doors/SM_DoorSingleRight_2/M_Doors2/T_Doors2_Normal_OpenGL.png b/Goods/Props/Doors/SM_DoorSingleRight_2/M_Doors2/T_Doors2_Normal_OpenGL.png new file mode 100644 index 0000000000000000000000000000000000000000..2c5ff00553e396ad70b5857a8bcf976361f1129d --- /dev/null +++ b/Goods/Props/Doors/SM_DoorSingleRight_2/M_Doors2/T_Doors2_Normal_OpenGL.png @@ -0,0 +1,3 @@ +version https://git-lfs.github.com/spec/v1 +oid sha256:1ff5be908b3b0303efe37b518954f1f67e69c9bc51ebe9a9c589c1d3c28139bc +size 52411440 diff --git a/Goods/Props/Doors/SM_DoubleDoorFrame/M_Doors2/T_Doors2_Normal_OpenGL.png b/Goods/Props/Doors/SM_DoubleDoorFrame/M_Doors2/T_Doors2_Normal_OpenGL.png new file mode 100644 index 0000000000000000000000000000000000000000..2c5ff00553e396ad70b5857a8bcf976361f1129d --- /dev/null +++ b/Goods/Props/Doors/SM_DoubleDoorFrame/M_Doors2/T_Doors2_Normal_OpenGL.png @@ -0,0 +1,3 @@ +version https://git-lfs.github.com/spec/v1 +oid sha256:1ff5be908b3b0303efe37b518954f1f67e69c9bc51ebe9a9c589c1d3c28139bc +size 52411440 diff --git a/Goods/Props/Doors/SM_WoodenDoorFrame/M_Doors1/T_Doors1_BaseColor.png b/Goods/Props/Doors/SM_WoodenDoorFrame/M_Doors1/T_Doors1_BaseColor.png new file mode 100644 index 0000000000000000000000000000000000000000..24a02904b9fa6d2ed596fa7f118f012329ca7614 --- /dev/null +++ b/Goods/Props/Doors/SM_WoodenDoorFrame/M_Doors1/T_Doors1_BaseColor.png @@ -0,0 +1,3 @@ +version https://git-lfs.github.com/spec/v1 +oid sha256:051ebd1702d3f6aaa59f05b306019b2ca804d1b55c03a69b5e989bf5bc4b2cf6 +size 17737677 diff --git a/Goods/Props/Doors/SM_WoodenDoorFrame/M_Doors1/T_Doors1_Normal.png b/Goods/Props/Doors/SM_WoodenDoorFrame/M_Doors1/T_Doors1_Normal.png new file mode 100644 index 0000000000000000000000000000000000000000..64890db26b3559e2b792da95d5dc35ed20afc6b1 --- /dev/null +++ b/Goods/Props/Doors/SM_WoodenDoorFrame/M_Doors1/T_Doors1_Normal.png @@ -0,0 +1,3 @@ +version https://git-lfs.github.com/spec/v1 +oid sha256:e4730d4f24a53f0b7b0bd850caa3c333f7f4c39dba01e8670e2974d1ab608cc1 +size 16204185 diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01a/MI_Fishing_Products_NN_01a.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01a/MI_Fishing_Products_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..09f66e48f7fdf581d2d4aca425b56e65fe576cce --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01a/MI_Fishing_Products_NN_01a.mdl @@ -0,0 +1,146 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Fishing_Products_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + float AlphaContrast = 0.0 + [[ + anno::display_name("Alpha Contrast"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaAdd = 0.0 + [[ + anno::display_name("Alpha Add"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaMulti = 1.0 + [[ + anno::display_name("Alpha Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float DitherMulti = 1.0 + [[ + anno::display_name("Dither Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + float Local11 = (0.0 - AlphaContrast); + float Local12 = (AlphaContrast + 1.0); + float Local13 = (Local4.w + AlphaAdd); + float Local14 = (Local13 * AlphaMulti); + float Local15 = math::lerp(Local11,Local12,Local14); + float Local16 = math::min(math::max(Local15,0.0),1.0); + float Local17 = math::saturate(Local16); + float Local18 = (Local17 * DitherMulti); + float Local19 = math::saturate(Local18); + float Local20 = ::dither_temporalAA(Local19, 1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local20 - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: true); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01a/OmniUe4Base.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01a/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01a/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01a/OmniUe4Function.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01a/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01a/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01b/MI_Fishing_Products_NN_01a.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01b/MI_Fishing_Products_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..09f66e48f7fdf581d2d4aca425b56e65fe576cce --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01b/MI_Fishing_Products_NN_01a.mdl @@ -0,0 +1,146 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Fishing_Products_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + float AlphaContrast = 0.0 + [[ + anno::display_name("Alpha Contrast"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaAdd = 0.0 + [[ + anno::display_name("Alpha Add"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaMulti = 1.0 + [[ + anno::display_name("Alpha Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float DitherMulti = 1.0 + [[ + anno::display_name("Dither Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + float Local11 = (0.0 - AlphaContrast); + float Local12 = (AlphaContrast + 1.0); + float Local13 = (Local4.w + AlphaAdd); + float Local14 = (Local13 * AlphaMulti); + float Local15 = math::lerp(Local11,Local12,Local14); + float Local16 = math::min(math::max(Local15,0.0),1.0); + float Local17 = math::saturate(Local16); + float Local18 = (Local17 * DitherMulti); + float Local19 = math::saturate(Local18); + float Local20 = ::dither_temporalAA(Local19, 1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local20 - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: true); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01b/OmniUe4Base.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01b/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01b/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01b/OmniUe4Function.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01b/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01b/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01c/MI_Fishing_Products_NN_01a.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01c/MI_Fishing_Products_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..09f66e48f7fdf581d2d4aca425b56e65fe576cce --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01c/MI_Fishing_Products_NN_01a.mdl @@ -0,0 +1,146 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Fishing_Products_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + float AlphaContrast = 0.0 + [[ + anno::display_name("Alpha Contrast"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaAdd = 0.0 + [[ + anno::display_name("Alpha Add"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaMulti = 1.0 + [[ + anno::display_name("Alpha Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float DitherMulti = 1.0 + [[ + anno::display_name("Dither Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + float Local11 = (0.0 - AlphaContrast); + float Local12 = (AlphaContrast + 1.0); + float Local13 = (Local4.w + AlphaAdd); + float Local14 = (Local13 * AlphaMulti); + float Local15 = math::lerp(Local11,Local12,Local14); + float Local16 = math::min(math::max(Local15,0.0),1.0); + float Local17 = math::saturate(Local16); + float Local18 = (Local17 * DitherMulti); + float Local19 = math::saturate(Local18); + float Local20 = ::dither_temporalAA(Local19, 1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local20 - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: true); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01c/OmniUe4Base.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01c/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01c/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01c/OmniUe4Function.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01c/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01c/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01d/MI_Fishing_Products_NN_01a.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01d/MI_Fishing_Products_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..09f66e48f7fdf581d2d4aca425b56e65fe576cce --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01d/MI_Fishing_Products_NN_01a.mdl @@ -0,0 +1,146 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Fishing_Products_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + float AlphaContrast = 0.0 + [[ + anno::display_name("Alpha Contrast"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaAdd = 0.0 + [[ + anno::display_name("Alpha Add"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaMulti = 1.0 + [[ + anno::display_name("Alpha Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float DitherMulti = 1.0 + [[ + anno::display_name("Dither Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + float Local11 = (0.0 - AlphaContrast); + float Local12 = (AlphaContrast + 1.0); + float Local13 = (Local4.w + AlphaAdd); + float Local14 = (Local13 * AlphaMulti); + float Local15 = math::lerp(Local11,Local12,Local14); + float Local16 = math::min(math::max(Local15,0.0),1.0); + float Local17 = math::saturate(Local16); + float Local18 = (Local17 * DitherMulti); + float Local19 = math::saturate(Local18); + float Local20 = ::dither_temporalAA(Local19, 1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local20 - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: true); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01d/OmniUe4Base.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01d/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01d/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01d/OmniUe4Function.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01d/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01d/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01e/MI_Fishing_Products_NN_01a.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01e/MI_Fishing_Products_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..09f66e48f7fdf581d2d4aca425b56e65fe576cce --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01e/MI_Fishing_Products_NN_01a.mdl @@ -0,0 +1,146 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Fishing_Products_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + float AlphaContrast = 0.0 + [[ + anno::display_name("Alpha Contrast"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaAdd = 0.0 + [[ + anno::display_name("Alpha Add"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaMulti = 1.0 + [[ + anno::display_name("Alpha Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float DitherMulti = 1.0 + [[ + anno::display_name("Dither Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + float Local11 = (0.0 - AlphaContrast); + float Local12 = (AlphaContrast + 1.0); + float Local13 = (Local4.w + AlphaAdd); + float Local14 = (Local13 * AlphaMulti); + float Local15 = math::lerp(Local11,Local12,Local14); + float Local16 = math::min(math::max(Local15,0.0),1.0); + float Local17 = math::saturate(Local16); + float Local18 = (Local17 * DitherMulti); + float Local19 = math::saturate(Local18); + float Local20 = ::dither_temporalAA(Local19, 1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local20 - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: true); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01e/OmniUe4Base.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01e/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01e/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01e/OmniUe4Function.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01e/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01e/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01f/MI_Fishing_Products_NN_01a.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01f/MI_Fishing_Products_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..09f66e48f7fdf581d2d4aca425b56e65fe576cce --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01f/MI_Fishing_Products_NN_01a.mdl @@ -0,0 +1,146 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Fishing_Products_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + float AlphaContrast = 0.0 + [[ + anno::display_name("Alpha Contrast"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaAdd = 0.0 + [[ + anno::display_name("Alpha Add"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaMulti = 1.0 + [[ + anno::display_name("Alpha Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float DitherMulti = 1.0 + [[ + anno::display_name("Dither Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + float Local11 = (0.0 - AlphaContrast); + float Local12 = (AlphaContrast + 1.0); + float Local13 = (Local4.w + AlphaAdd); + float Local14 = (Local13 * AlphaMulti); + float Local15 = math::lerp(Local11,Local12,Local14); + float Local16 = math::min(math::max(Local15,0.0),1.0); + float Local17 = math::saturate(Local16); + float Local18 = (Local17 * DitherMulti); + float Local19 = math::saturate(Local18); + float Local20 = ::dither_temporalAA(Local19, 1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local20 - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: true); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01f/OmniUe4Base.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01f/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01f/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01f/OmniUe4Function.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01f/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01f/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01g/MI_Fishing_Products_NN_01a.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01g/MI_Fishing_Products_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..09f66e48f7fdf581d2d4aca425b56e65fe576cce --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01g/MI_Fishing_Products_NN_01a.mdl @@ -0,0 +1,146 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Fishing_Products_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + float AlphaContrast = 0.0 + [[ + anno::display_name("Alpha Contrast"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaAdd = 0.0 + [[ + anno::display_name("Alpha Add"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaMulti = 1.0 + [[ + anno::display_name("Alpha Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float DitherMulti = 1.0 + [[ + anno::display_name("Dither Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + float Local11 = (0.0 - AlphaContrast); + float Local12 = (AlphaContrast + 1.0); + float Local13 = (Local4.w + AlphaAdd); + float Local14 = (Local13 * AlphaMulti); + float Local15 = math::lerp(Local11,Local12,Local14); + float Local16 = math::min(math::max(Local15,0.0),1.0); + float Local17 = math::saturate(Local16); + float Local18 = (Local17 * DitherMulti); + float Local19 = math::saturate(Local18); + float Local20 = ::dither_temporalAA(Local19, 1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local20 - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: true); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01g/OmniUe4Base.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01g/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01g/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01g/OmniUe4Function.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01g/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01g/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01h/MI_Fishing_Products_NN_01a.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01h/MI_Fishing_Products_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..09f66e48f7fdf581d2d4aca425b56e65fe576cce --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01h/MI_Fishing_Products_NN_01a.mdl @@ -0,0 +1,146 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Fishing_Products_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + float AlphaContrast = 0.0 + [[ + anno::display_name("Alpha Contrast"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaAdd = 0.0 + [[ + anno::display_name("Alpha Add"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaMulti = 1.0 + [[ + anno::display_name("Alpha Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float DitherMulti = 1.0 + [[ + anno::display_name("Dither Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + float Local11 = (0.0 - AlphaContrast); + float Local12 = (AlphaContrast + 1.0); + float Local13 = (Local4.w + AlphaAdd); + float Local14 = (Local13 * AlphaMulti); + float Local15 = math::lerp(Local11,Local12,Local14); + float Local16 = math::min(math::max(Local15,0.0),1.0); + float Local17 = math::saturate(Local16); + float Local18 = (Local17 * DitherMulti); + float Local19 = math::saturate(Local18); + float Local20 = ::dither_temporalAA(Local19, 1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local20 - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: true); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01h/OmniUe4Base.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01h/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01h/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01h/OmniUe4Function.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01h/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01h/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01i/MI_Fishing_Products_NN_01a.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01i/MI_Fishing_Products_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..09f66e48f7fdf581d2d4aca425b56e65fe576cce --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01i/MI_Fishing_Products_NN_01a.mdl @@ -0,0 +1,146 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Fishing_Products_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + float AlphaContrast = 0.0 + [[ + anno::display_name("Alpha Contrast"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaAdd = 0.0 + [[ + anno::display_name("Alpha Add"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaMulti = 1.0 + [[ + anno::display_name("Alpha Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float DitherMulti = 1.0 + [[ + anno::display_name("Dither Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + float Local11 = (0.0 - AlphaContrast); + float Local12 = (AlphaContrast + 1.0); + float Local13 = (Local4.w + AlphaAdd); + float Local14 = (Local13 * AlphaMulti); + float Local15 = math::lerp(Local11,Local12,Local14); + float Local16 = math::min(math::max(Local15,0.0),1.0); + float Local17 = math::saturate(Local16); + float Local18 = (Local17 * DitherMulti); + float Local19 = math::saturate(Local18); + float Local20 = ::dither_temporalAA(Local19, 1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local20 - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: true); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01i/OmniUe4Base.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01i/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01i/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01i/OmniUe4Function.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01i/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01i/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01j/MI_Fishing_Products_NN_01a.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01j/MI_Fishing_Products_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..09f66e48f7fdf581d2d4aca425b56e65fe576cce --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01j/MI_Fishing_Products_NN_01a.mdl @@ -0,0 +1,146 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Fishing_Products_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + float AlphaContrast = 0.0 + [[ + anno::display_name("Alpha Contrast"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaAdd = 0.0 + [[ + anno::display_name("Alpha Add"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaMulti = 1.0 + [[ + anno::display_name("Alpha Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float DitherMulti = 1.0 + [[ + anno::display_name("Dither Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + float Local11 = (0.0 - AlphaContrast); + float Local12 = (AlphaContrast + 1.0); + float Local13 = (Local4.w + AlphaAdd); + float Local14 = (Local13 * AlphaMulti); + float Local15 = math::lerp(Local11,Local12,Local14); + float Local16 = math::min(math::max(Local15,0.0),1.0); + float Local17 = math::saturate(Local16); + float Local18 = (Local17 * DitherMulti); + float Local19 = math::saturate(Local18); + float Local20 = ::dither_temporalAA(Local19, 1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local20 - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: true); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01j/OmniUe4Base.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01j/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01j/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01j/OmniUe4Function.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01j/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01j/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01k/MI_Fishing_Products_NN_01a.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01k/MI_Fishing_Products_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..09f66e48f7fdf581d2d4aca425b56e65fe576cce --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01k/MI_Fishing_Products_NN_01a.mdl @@ -0,0 +1,146 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Fishing_Products_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + float AlphaContrast = 0.0 + [[ + anno::display_name("Alpha Contrast"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaAdd = 0.0 + [[ + anno::display_name("Alpha Add"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaMulti = 1.0 + [[ + anno::display_name("Alpha Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float DitherMulti = 1.0 + [[ + anno::display_name("Dither Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + float Local11 = (0.0 - AlphaContrast); + float Local12 = (AlphaContrast + 1.0); + float Local13 = (Local4.w + AlphaAdd); + float Local14 = (Local13 * AlphaMulti); + float Local15 = math::lerp(Local11,Local12,Local14); + float Local16 = math::min(math::max(Local15,0.0),1.0); + float Local17 = math::saturate(Local16); + float Local18 = (Local17 * DitherMulti); + float Local19 = math::saturate(Local18); + float Local20 = ::dither_temporalAA(Local19, 1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local20 - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: true); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01k/OmniUe4Base.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01k/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01k/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01k/OmniUe4Function.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01k/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01k/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01l/MI_Fishing_Products_NN_01a.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01l/MI_Fishing_Products_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..09f66e48f7fdf581d2d4aca425b56e65fe576cce --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01l/MI_Fishing_Products_NN_01a.mdl @@ -0,0 +1,146 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Fishing_Products_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + float AlphaContrast = 0.0 + [[ + anno::display_name("Alpha Contrast"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaAdd = 0.0 + [[ + anno::display_name("Alpha Add"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaMulti = 1.0 + [[ + anno::display_name("Alpha Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float DitherMulti = 1.0 + [[ + anno::display_name("Dither Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + float Local11 = (0.0 - AlphaContrast); + float Local12 = (AlphaContrast + 1.0); + float Local13 = (Local4.w + AlphaAdd); + float Local14 = (Local13 * AlphaMulti); + float Local15 = math::lerp(Local11,Local12,Local14); + float Local16 = math::min(math::max(Local15,0.0),1.0); + float Local17 = math::saturate(Local16); + float Local18 = (Local17 * DitherMulti); + float Local19 = math::saturate(Local18); + float Local20 = ::dither_temporalAA(Local19, 1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local20 - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: true); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01l/OmniUe4Base.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01l/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01l/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01l/OmniUe4Function.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01l/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01l/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01m/MI_Fishing_Products_NN_01a.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01m/MI_Fishing_Products_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..09f66e48f7fdf581d2d4aca425b56e65fe576cce --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01m/MI_Fishing_Products_NN_01a.mdl @@ -0,0 +1,146 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Fishing_Products_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + float AlphaContrast = 0.0 + [[ + anno::display_name("Alpha Contrast"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaAdd = 0.0 + [[ + anno::display_name("Alpha Add"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaMulti = 1.0 + [[ + anno::display_name("Alpha Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float DitherMulti = 1.0 + [[ + anno::display_name("Dither Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + float Local11 = (0.0 - AlphaContrast); + float Local12 = (AlphaContrast + 1.0); + float Local13 = (Local4.w + AlphaAdd); + float Local14 = (Local13 * AlphaMulti); + float Local15 = math::lerp(Local11,Local12,Local14); + float Local16 = math::min(math::max(Local15,0.0),1.0); + float Local17 = math::saturate(Local16); + float Local18 = (Local17 * DitherMulti); + float Local19 = math::saturate(Local18); + float Local20 = ::dither_temporalAA(Local19, 1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local20 - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: true); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01m/OmniUe4Base.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01m/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01m/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01m/OmniUe4Function.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01m/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01m/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01n/MI_Fishing_Products_NN_01a.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01n/MI_Fishing_Products_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..09f66e48f7fdf581d2d4aca425b56e65fe576cce --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01n/MI_Fishing_Products_NN_01a.mdl @@ -0,0 +1,146 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Fishing_Products_NN_01a( + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + uniform texture_2d Albedo = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Fishing_Products_NN_01a/TX_Fishing_Products_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + float AlphaContrast = 0.0 + [[ + anno::display_name("Alpha Contrast"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaAdd = 0.0 + [[ + anno::display_name("Alpha Add"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float AlphaMulti = 1.0 + [[ + anno::display_name("Alpha Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + float DitherMulti = 1.0 + [[ + anno::display_name("Dither Multi"), + anno::ui_order(32), + anno::in_group("Opacity") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local2 = (1.0 - float3(Local1.x,Local1.y,Local1.z)); + float3 Local3 = math::lerp(float3(NormalIntensity,NormalIntensity,NormalIntensity),float3(0.0,0.0,1.0),Local2.x); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + float Local11 = (0.0 - AlphaContrast); + float Local12 = (AlphaContrast + 1.0); + float Local13 = (Local4.w + AlphaAdd); + float Local14 = (Local13 * AlphaMulti); + float Local15 = math::lerp(Local11,Local12,Local14); + float Local16 = math::min(math::max(Local15,0.0),1.0); + float Local17 = math::saturate(Local16); + float Local18 = (Local17 * DitherMulti); + float Local19 = math::saturate(Local18); + float Local20 = ::dither_temporalAA(Local19, 1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local20 - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: true); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01n/OmniUe4Base.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01n/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01n/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Fishing/SM_Fishing_Products_NN_01n/OmniUe4Function.mdl b/Goods/Props/Fishing/SM_Fishing_Products_NN_01n/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Fishing/SM_Fishing_Products_NN_01n/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood.mdl b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood.mdl new file mode 100644 index 0000000000000000000000000000000000000000..bc1eaf019791ac3e81f5bba05a87f33e1dc5e0b4 --- /dev/null +++ b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_FrozenFood( + uniform texture_2d Normal = texture_2d("./MI_FrozenFood/T_FrozenFood_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_FrozenFood/T_FrozenFood_01.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_FrozenFood/T_FrozenFood_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_10.mdl b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_10.mdl new file mode 100644 index 0000000000000000000000000000000000000000..fda52f79a7b730131e75007aa3fe0418cae72c69 --- /dev/null +++ b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_10.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_FrozenFood_10( + uniform texture_2d Normal = texture_2d("./MI_FrozenFood_10/T_FrozenFood_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_FrozenFood_10/T_FrozenFood_10.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_FrozenFood_10/T_FrozenFood_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_11.mdl b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_11.mdl new file mode 100644 index 0000000000000000000000000000000000000000..b87a5b3119ff96df767424cc0926e2839a8c8ce9 --- /dev/null +++ b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_11.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_FrozenFood_11( + uniform texture_2d Normal = texture_2d("./MI_FrozenFood_11/T_FrozenFood_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_FrozenFood_11/T_FrozenFood_11.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_FrozenFood_11/T_FrozenFood_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_12.mdl b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_12.mdl new file mode 100644 index 0000000000000000000000000000000000000000..98a355b5030373d5ef7471c5fb79c23e318fa53c --- /dev/null +++ b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_12.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_FrozenFood_12( + uniform texture_2d Normal = texture_2d("./MI_FrozenFood_12/T_FrozenFood_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_FrozenFood_12/T_FrozenFood_12.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_FrozenFood_12/T_FrozenFood_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_13.mdl b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_13.mdl new file mode 100644 index 0000000000000000000000000000000000000000..de87abee51a006cfb58cd4bdc50bfe3c9a12e823 --- /dev/null +++ b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_13.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_FrozenFood_13( + uniform texture_2d Normal = texture_2d("./MI_FrozenFood_13/T_FrozenFood_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_FrozenFood_13/T_FrozenFood_13.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_FrozenFood_13/T_FrozenFood_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_2.mdl b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_2.mdl new file mode 100644 index 0000000000000000000000000000000000000000..31775e951ae7ec3f310c05fda85041d3ca2c7780 --- /dev/null +++ b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_2.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_FrozenFood_2( + uniform texture_2d Normal = texture_2d("./MI_FrozenFood_2/T_FrozenFood_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_FrozenFood_2/T_FrozenFood_02.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_FrozenFood_2/T_FrozenFood_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_3.mdl b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_3.mdl new file mode 100644 index 0000000000000000000000000000000000000000..68b645b51739ba5c2c414acfb58b282566b47a5f --- /dev/null +++ b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_3.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_FrozenFood_3( + uniform texture_2d Normal = texture_2d("./MI_FrozenFood_3/T_FrozenFood_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_FrozenFood_3/T_FrozenFood_03.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_FrozenFood_3/T_FrozenFood_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_4.mdl b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_4.mdl new file mode 100644 index 0000000000000000000000000000000000000000..4201cc04b2a263bfb1ea19f09b3201d23072258b --- /dev/null +++ b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_4.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_FrozenFood_4( + uniform texture_2d Normal = texture_2d("./MI_FrozenFood_4/T_FrozenFood_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_FrozenFood_4/T_FrozenFood_04.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_FrozenFood_4/T_FrozenFood_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_5.mdl b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_5.mdl new file mode 100644 index 0000000000000000000000000000000000000000..75a6132f68f6b63a0fc0431b8ed6fe2e72ddefc7 --- /dev/null +++ b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_5.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_FrozenFood_5( + uniform texture_2d Normal = texture_2d("./MI_FrozenFood_5/T_FrozenFood_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_FrozenFood_5/T_FrozenFood_05.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_FrozenFood_5/T_FrozenFood_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_6.mdl b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_6.mdl new file mode 100644 index 0000000000000000000000000000000000000000..f191f342d60aa3562333f29714119326bfe8326a --- /dev/null +++ b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_6.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_FrozenFood_6( + uniform texture_2d Normal = texture_2d("./MI_FrozenFood_6/T_FrozenFood_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_FrozenFood_6/T_FrozenFood_06.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_FrozenFood_6/T_FrozenFood_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_7.mdl b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_7.mdl new file mode 100644 index 0000000000000000000000000000000000000000..6323adbb56afcc3ba05fb824883a3ffe9adb0a40 --- /dev/null +++ b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_7.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_FrozenFood_7( + uniform texture_2d Normal = texture_2d("./MI_FrozenFood_7/T_FrozenFood_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_FrozenFood_7/T_FrozenFood_07.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_FrozenFood_7/T_FrozenFood_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_8.mdl b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_8.mdl new file mode 100644 index 0000000000000000000000000000000000000000..cfcf5aac1f1a7c6f875389d36b40c2086464a46b --- /dev/null +++ b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_8.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_FrozenFood_8( + uniform texture_2d Normal = texture_2d("./MI_FrozenFood_8/T_FrozenFood_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_FrozenFood_8/T_FrozenFood_08.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_FrozenFood_8/T_FrozenFood_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_9.mdl b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_9.mdl new file mode 100644 index 0000000000000000000000000000000000000000..28b58dd252507f19ed3ee89bc2cbf0032273b9d1 --- /dev/null +++ b/Goods/Props/Food/SM_FrozenFood_01/MI_FrozenFood_9.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_FrozenFood_9( + uniform texture_2d Normal = texture_2d("./MI_FrozenFood_9/T_FrozenFood_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_FrozenFood_9/T_FrozenFood_09.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_FrozenFood_9/T_FrozenFood_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_FrozenFood_01/OmniUe4Base.mdl b/Goods/Props/Food/SM_FrozenFood_01/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Food/SM_FrozenFood_01/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Food/SM_FrozenFood_01/OmniUe4Function.mdl b/Goods/Props/Food/SM_FrozenFood_01/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Food/SM_FrozenFood_01/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Food/SM_FrozenFood_01/SM_FrozenFood_01.usd b/Goods/Props/Food/SM_FrozenFood_01/SM_FrozenFood_01.usd new file mode 100644 index 0000000000000000000000000000000000000000..874c1954846d851bdd8000457d8215f7386a57be Binary files /dev/null and b/Goods/Props/Food/SM_FrozenFood_01/SM_FrozenFood_01.usd differ diff --git a/Goods/Props/Food/SM_IceCream_01/MI_IceCream.mdl b/Goods/Props/Food/SM_IceCream_01/MI_IceCream.mdl new file mode 100644 index 0000000000000000000000000000000000000000..b789c22cdc35216cc1b262ff1f10726a20642f82 --- /dev/null +++ b/Goods/Props/Food/SM_IceCream_01/MI_IceCream.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_IceCream( + uniform texture_2d Normal = texture_2d("./MI_IceCream/T_IceCream_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_IceCream/T_IceCream_01.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_IceCream/T_IceCream_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_IceCream_01/MI_IceCream_2.mdl b/Goods/Props/Food/SM_IceCream_01/MI_IceCream_2.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a988c7ca45a50ea0c263e5607147c955edcd033d --- /dev/null +++ b/Goods/Props/Food/SM_IceCream_01/MI_IceCream_2.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_IceCream_2( + uniform texture_2d Normal = texture_2d("./MI_IceCream_2/T_IceCream_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_IceCream_2/T_IceCream_02.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_IceCream_2/T_IceCream_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_IceCream_01/MI_IceCream_3.mdl b/Goods/Props/Food/SM_IceCream_01/MI_IceCream_3.mdl new file mode 100644 index 0000000000000000000000000000000000000000..b161fcabf95e55c79e47605d0967b8c2ec0e7309 --- /dev/null +++ b/Goods/Props/Food/SM_IceCream_01/MI_IceCream_3.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_IceCream_3( + uniform texture_2d Normal = texture_2d("./MI_IceCream_3/T_IceCream_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_IceCream_3/T_IceCream_03.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_IceCream_3/T_IceCream_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_IceCream_01/MI_IceCream_4.mdl b/Goods/Props/Food/SM_IceCream_01/MI_IceCream_4.mdl new file mode 100644 index 0000000000000000000000000000000000000000..7eaa34442d35cebc85fb14f9a88510db1638a059 --- /dev/null +++ b/Goods/Props/Food/SM_IceCream_01/MI_IceCream_4.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_IceCream_4( + uniform texture_2d Normal = texture_2d("./MI_IceCream_4/T_IceCream_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_IceCream_4/T_IceCream_04.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_IceCream_4/T_IceCream_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_IceCream_01/MI_IceCream_5.mdl b/Goods/Props/Food/SM_IceCream_01/MI_IceCream_5.mdl new file mode 100644 index 0000000000000000000000000000000000000000..17d0d65b6bffb280924776010c94d46c0986f537 --- /dev/null +++ b/Goods/Props/Food/SM_IceCream_01/MI_IceCream_5.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_IceCream_5( + uniform texture_2d Normal = texture_2d("./MI_IceCream_5/T_IceCream_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_IceCream_5/T_IceCream_05.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_IceCream_5/T_IceCream_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_IceCream_01/MI_IceCream_6.mdl b/Goods/Props/Food/SM_IceCream_01/MI_IceCream_6.mdl new file mode 100644 index 0000000000000000000000000000000000000000..6792a68cd6e3fde9aca46bbdd99f3ce5f2609e7f --- /dev/null +++ b/Goods/Props/Food/SM_IceCream_01/MI_IceCream_6.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_IceCream_6( + uniform texture_2d Normal = texture_2d("./MI_IceCream_6/T_IceCream_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_IceCream_6/T_IceCream_06.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_IceCream_6/T_IceCream_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_IceCream_01/MI_IceCream_7.mdl b/Goods/Props/Food/SM_IceCream_01/MI_IceCream_7.mdl new file mode 100644 index 0000000000000000000000000000000000000000..4e15b46894451468d5c42cfa67c6fe868ae45008 --- /dev/null +++ b/Goods/Props/Food/SM_IceCream_01/MI_IceCream_7.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_IceCream_7( + uniform texture_2d Normal = texture_2d("./MI_IceCream_7/T_IceCream_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_IceCream_7/T_IceCream_07.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_IceCream_7/T_IceCream_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_IceCream_01/MI_IceCream_8.mdl b/Goods/Props/Food/SM_IceCream_01/MI_IceCream_8.mdl new file mode 100644 index 0000000000000000000000000000000000000000..6dd378ffebfd6a60974701a5a66c7a2725d4b636 --- /dev/null +++ b/Goods/Props/Food/SM_IceCream_01/MI_IceCream_8.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_IceCream_8( + uniform texture_2d Normal = texture_2d("./MI_IceCream_8/T_IceCream_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_IceCream_8/T_IceCream_08.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_IceCream_8/T_IceCream_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_IceCream_01/OmniUe4Base.mdl b/Goods/Props/Food/SM_IceCream_01/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Food/SM_IceCream_01/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Food/SM_IceCream_01/OmniUe4Function.mdl b/Goods/Props/Food/SM_IceCream_01/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Food/SM_IceCream_01/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Food/SM_IceCream_01/SM_IceCream_01.usd b/Goods/Props/Food/SM_IceCream_01/SM_IceCream_01.usd new file mode 100644 index 0000000000000000000000000000000000000000..8000f8444bd6ccca5514893900dccf2f428a6b42 Binary files /dev/null and b/Goods/Props/Food/SM_IceCream_01/SM_IceCream_01.usd differ diff --git a/Goods/Props/Food/SM_Onigiri/MI_Onigiri_1.mdl b/Goods/Props/Food/SM_Onigiri/MI_Onigiri_1.mdl new file mode 100644 index 0000000000000000000000000000000000000000..6759a966ecfbeaf109bde9bed3d44fc37cfb2471 --- /dev/null +++ b/Goods/Props/Food/SM_Onigiri/MI_Onigiri_1.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Onigiri_1( + uniform texture_2d Normal = texture_2d("./MI_Onigiri_1/T_Onigiri_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Onigiri_1/T_Onigiri_05.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Onigiri_1/T_Onigiri_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_Onigiri/MI_Onigiri_2.mdl b/Goods/Props/Food/SM_Onigiri/MI_Onigiri_2.mdl new file mode 100644 index 0000000000000000000000000000000000000000..1e4c20e8f8ff13d03dce128d97dda6f7c76a7401 --- /dev/null +++ b/Goods/Props/Food/SM_Onigiri/MI_Onigiri_2.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Onigiri_2( + uniform texture_2d Normal = texture_2d("./MI_Onigiri_2/T_Onigiri_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Onigiri_2/T_Onigiri_01.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Onigiri_2/T_Onigiri_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_Onigiri/MI_Onigiri_3.mdl b/Goods/Props/Food/SM_Onigiri/MI_Onigiri_3.mdl new file mode 100644 index 0000000000000000000000000000000000000000..c2231ba9c22413e628f1e33b223fe9cbbb770da5 --- /dev/null +++ b/Goods/Props/Food/SM_Onigiri/MI_Onigiri_3.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Onigiri_3( + uniform texture_2d Normal = texture_2d("./MI_Onigiri_3/T_Onigiri_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Onigiri_3/T_Onigiri_02.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Onigiri_3/T_Onigiri_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_Onigiri/MI_Onigiri_4.mdl b/Goods/Props/Food/SM_Onigiri/MI_Onigiri_4.mdl new file mode 100644 index 0000000000000000000000000000000000000000..2cda9410b175dec9736ea6bdc88a0e8718502a72 --- /dev/null +++ b/Goods/Props/Food/SM_Onigiri/MI_Onigiri_4.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Onigiri_4( + uniform texture_2d Normal = texture_2d("./MI_Onigiri_4/T_Onigiri_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Onigiri_4/T_Onigiri_03.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Onigiri_4/T_Onigiri_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_Onigiri/MI_Onigiri_5.mdl b/Goods/Props/Food/SM_Onigiri/MI_Onigiri_5.mdl new file mode 100644 index 0000000000000000000000000000000000000000..ac764e9767e70412964a5f4c6d4870e59a256a17 --- /dev/null +++ b/Goods/Props/Food/SM_Onigiri/MI_Onigiri_5.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Onigiri_5( + uniform texture_2d Normal = texture_2d("./MI_Onigiri_5/T_Onigiri_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Onigiri_5/T_Onigiri_04.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Onigiri_5/T_Onigiri_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_Onigiri/OmniUe4Base.mdl b/Goods/Props/Food/SM_Onigiri/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Food/SM_Onigiri/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Food/SM_Onigiri/OmniUe4Function.mdl b/Goods/Props/Food/SM_Onigiri/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Food/SM_Onigiri/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Food/SM_Onigiri/SM_Onigiri.usd b/Goods/Props/Food/SM_Onigiri/SM_Onigiri.usd new file mode 100644 index 0000000000000000000000000000000000000000..0f04360da3de1a89d1a43ce52c8b345a2092bf6a Binary files /dev/null and b/Goods/Props/Food/SM_Onigiri/SM_Onigiri.usd differ diff --git a/Goods/Props/Food/SM_Sandwich/MI_Sandwich_1.mdl b/Goods/Props/Food/SM_Sandwich/MI_Sandwich_1.mdl new file mode 100644 index 0000000000000000000000000000000000000000..5c9e5e7ec1884b9f96e22bca41601638df71e135 --- /dev/null +++ b/Goods/Props/Food/SM_Sandwich/MI_Sandwich_1.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Sandwich_1( + uniform texture_2d Normal = texture_2d("./MI_Sandwich_1/T_Sandwich_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Sandwich_1/T_Sandwich_01.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Sandwich_1/T_Sandwich_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_Sandwich/MI_Sandwich_2.mdl b/Goods/Props/Food/SM_Sandwich/MI_Sandwich_2.mdl new file mode 100644 index 0000000000000000000000000000000000000000..2400d0eb2be0b3c44fc61c127de32089394138a4 --- /dev/null +++ b/Goods/Props/Food/SM_Sandwich/MI_Sandwich_2.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Sandwich_2( + uniform texture_2d Normal = texture_2d("./MI_Sandwich_2/T_Sandwich_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Sandwich_2/T_Sandwich_02.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Sandwich_2/T_Sandwich_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_Sandwich/MI_Sandwich_3.mdl b/Goods/Props/Food/SM_Sandwich/MI_Sandwich_3.mdl new file mode 100644 index 0000000000000000000000000000000000000000..57e9d8157e55878e640ce963a43bbef578847651 --- /dev/null +++ b/Goods/Props/Food/SM_Sandwich/MI_Sandwich_3.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Sandwich_3( + uniform texture_2d Normal = texture_2d("./MI_Sandwich_3/T_Sandwich_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Sandwich_3/T_Sandwich_03.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Sandwich_3/T_Sandwich_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Food/SM_Sandwich/OmniUe4Base.mdl b/Goods/Props/Food/SM_Sandwich/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Food/SM_Sandwich/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Food/SM_Sandwich/OmniUe4Function.mdl b/Goods/Props/Food/SM_Sandwich/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Food/SM_Sandwich/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Food/SM_Sandwich/SM_Sandwich.usd b/Goods/Props/Food/SM_Sandwich/SM_Sandwich.usd new file mode 100644 index 0000000000000000000000000000000000000000..2f7877a7721d32ef69a91c52e062bcea56a7bb5c Binary files /dev/null and b/Goods/Props/Food/SM_Sandwich/SM_Sandwich.usd differ diff --git 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sha256:8e7540ea931b71f065c56f22399d7407f98d8a571559f67773ad60755dad7dc8 +size 10954218 diff --git a/Goods/Props/Grocery/SM_Can_Pineapple/M_Can_Clean/T_Can_Clean_4K_D.png b/Goods/Props/Grocery/SM_Can_Pineapple/M_Can_Clean/T_Can_Clean_4K_D.png new file mode 100644 index 0000000000000000000000000000000000000000..963f6fa00c6ac6a6da505e0ba5caaa304a269401 --- /dev/null +++ b/Goods/Props/Grocery/SM_Can_Pineapple/M_Can_Clean/T_Can_Clean_4K_D.png @@ -0,0 +1,3 @@ +version https://git-lfs.github.com/spec/v1 +oid sha256:3cfb79a13d9afd4d938fab7ab7805aadabcd7e4825c1004998166937545af9c1 +size 17417934 diff --git a/Goods/Props/Grocery/SM_SmallJar/M_Grocery3/T_Grocery3_Normal_OpenGL.png b/Goods/Props/Grocery/SM_SmallJar/M_Grocery3/T_Grocery3_Normal_OpenGL.png new file mode 100644 index 0000000000000000000000000000000000000000..3e063a2d535cb0440bf938cf570c67db812b5094 --- /dev/null +++ b/Goods/Props/Grocery/SM_SmallJar/M_Grocery3/T_Grocery3_Normal_OpenGL.png @@ -0,0 +1,3 @@ +version https://git-lfs.github.com/spec/v1 +oid sha256:e067292eb7b1b11e426ad8477b4d5e7b4b072d71e53541b451b5330f8d9ef89e +size 60975088 diff --git a/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01a/MI_Bathroom_Products_Set_NN_01a.mdl b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01a/MI_Bathroom_Products_Set_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..de5d83bfcfbd6f0dab88dfd57cca457ee43a266b --- /dev/null +++ b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01a/MI_Bathroom_Products_Set_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bathroom_Products_Set_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bathroom_Products_Set_NN_01a/TX_Bathroom_Products_Set_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Bathroom_Products_Set_NN_01a/TX_Bathroom_Products_Set_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Bathroom_Products_Set_NN_01a/TX_Bathroom_Products_Set_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01a/OmniUe4Base.mdl b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01a/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01a/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01a/OmniUe4Function.mdl b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01a/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01a/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01b/MI_Bathroom_Products_Set_NN_01a.mdl b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01b/MI_Bathroom_Products_Set_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..de5d83bfcfbd6f0dab88dfd57cca457ee43a266b --- /dev/null +++ b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01b/MI_Bathroom_Products_Set_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bathroom_Products_Set_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bathroom_Products_Set_NN_01a/TX_Bathroom_Products_Set_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Bathroom_Products_Set_NN_01a/TX_Bathroom_Products_Set_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Bathroom_Products_Set_NN_01a/TX_Bathroom_Products_Set_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01b/OmniUe4Base.mdl b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01b/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01b/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01b/OmniUe4Function.mdl b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01b/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01b/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01b/SM_Bathroom_Products_Set_NN_01b.usd b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01b/SM_Bathroom_Products_Set_NN_01b.usd new file mode 100644 index 0000000000000000000000000000000000000000..7df0519f8d2130ab186b1d395b0ad86e8a9c932e Binary files /dev/null and b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01b/SM_Bathroom_Products_Set_NN_01b.usd differ diff --git a/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01f/MI_Bathroom_Products_Set_NN_01a.mdl b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01f/MI_Bathroom_Products_Set_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..de5d83bfcfbd6f0dab88dfd57cca457ee43a266b --- /dev/null +++ b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01f/MI_Bathroom_Products_Set_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bathroom_Products_Set_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bathroom_Products_Set_NN_01a/TX_Bathroom_Products_Set_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Bathroom_Products_Set_NN_01a/TX_Bathroom_Products_Set_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Bathroom_Products_Set_NN_01a/TX_Bathroom_Products_Set_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01f/OmniUe4Base.mdl b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01f/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01f/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01f/OmniUe4Function.mdl b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01f/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01f/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01h/MI_Bathroom_Products_Set_NN_01a.mdl b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01h/MI_Bathroom_Products_Set_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..de5d83bfcfbd6f0dab88dfd57cca457ee43a266b --- /dev/null +++ b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01h/MI_Bathroom_Products_Set_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bathroom_Products_Set_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bathroom_Products_Set_NN_01a/TX_Bathroom_Products_Set_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Bathroom_Products_Set_NN_01a/TX_Bathroom_Products_Set_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Bathroom_Products_Set_NN_01a/TX_Bathroom_Products_Set_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01h/OmniUe4Base.mdl b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01h/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01h/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01h/OmniUe4Function.mdl b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01h/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01h/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01i/MI_Bathroom_Products_Set_NN_01a.mdl b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01i/MI_Bathroom_Products_Set_NN_01a.mdl new file mode 100644 index 0000000000000000000000000000000000000000..de5d83bfcfbd6f0dab88dfd57cca457ee43a266b --- /dev/null +++ b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01i/MI_Bathroom_Products_Set_NN_01a.mdl @@ -0,0 +1,109 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bathroom_Products_Set_NN_01a( + float TextureCoord = 1.0 + [[ + anno::display_name("Texture Coord"), + anno::ui_order(32), + anno::in_group("-Textures-") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bathroom_Products_Set_NN_01a/TX_Bathroom_Products_Set_NN_01a_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Normal") + ]], + uniform texture_2d Albedo = texture_2d("./MI_Bathroom_Products_Set_NN_01a/TX_Bathroom_Products_Set_NN_01a_ALB.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo "), + anno::in_group("-Textures-"), + sampler_color() + ]], + float4 AlbedoColorTint_Base_ = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color Tint (Base)"), + anno::ui_order(32), + anno::in_group("Albedo") + ]], + uniform texture_2d RMA = texture_2d("./MI_Bathroom_Products_Set_NN_01a/TX_Bathroom_Products_Set_NN_01a_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMA"), + anno::description("R = Roughness | G = Metalness | B = Ambient Occlusion | A = Other "), + anno::ui_order(32), + anno::in_group("-Textures-"), + sampler_masks() + ]], + float MetalnessValue = 1.0 + [[ + anno::display_name("Metalness Value"), + anno::ui_order(32), + anno::in_group("Metalness") + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * TextureCoord); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(Albedo,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(AlbedoColorTint_Base_.x,AlbedoColorTint_Base_.y,AlbedoColorTint_Base_.z)); + float4 Local6 = tex::lookup_float4(RMA,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float Local7 = (Local6.y * MetalnessValue); + float Local8 = math::saturate(Local7); + float Local9 = (Local6.z * 0.5); + float Local10 = math::min(math::max(Local6.x,0.0),1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local8; + float Specular_mdl = Local9; + float Roughness_mdl = Local10; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01i/OmniUe4Base.mdl b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01i/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01i/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01i/OmniUe4Function.mdl b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01i/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_Bathroom_Products_Set_NN_01i/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_Bleach1/M_CleaningAssets.mdl b/Goods/Props/Household/SM_Bleach1/M_CleaningAssets.mdl new file mode 100644 index 0000000000000000000000000000000000000000..f653b9917815a3a52bb0fd4c288cb476ab43714f --- /dev/null +++ b/Goods/Props/Household/SM_Bleach1/M_CleaningAssets.mdl @@ -0,0 +1,57 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_CleaningAssets( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_CleaningAssets/T_CleaningAssets_Normal.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_CleaningAssets/T_CleaningAssets_BaseColor.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_CleaningAssets/T_CleaningAssets_Metallic.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local3 = tex::lookup_float4(texture_2d("./M_CleaningAssets/T_CleaningAssets_Roughness.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = float3(Local2.x,Local2.y,Local2.z).x; + float Specular_mdl = 0.5; + float Roughness_mdl = float3(Local3.x,Local3.y,Local3.z).x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Bleach1/OmniUe4Base.mdl b/Goods/Props/Household/SM_Bleach1/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_Bleach1/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_Bleach1/OmniUe4Function.mdl b/Goods/Props/Household/SM_Bleach1/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_Bleach1/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_Bleach1/SM_Bleach1.usd b/Goods/Props/Household/SM_Bleach1/SM_Bleach1.usd new file mode 100644 index 0000000000000000000000000000000000000000..69754895588874269864090fc7ddc0574fc59485 Binary files /dev/null and b/Goods/Props/Household/SM_Bleach1/SM_Bleach1.usd differ diff --git a/Goods/Props/Household/SM_Bucket/MI_Bucket.mdl b/Goods/Props/Household/SM_Bucket/MI_Bucket.mdl new file mode 100644 index 0000000000000000000000000000000000000000..217c75b98efdf77a81fc9bca493c98e2f6809c38 --- /dev/null +++ b/Goods/Props/Household/SM_Bucket/MI_Bucket.mdl @@ -0,0 +1,99 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bucket( + float Tile = 1.0 + [[ + anno::display_name("Tile"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bucket/T_MopBucket_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + float4 AlbedoColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color"), + anno::ui_order(32), + anno::in_group("Coloring") + ]], + uniform texture_2d BaseColor = texture_2d("./MI_Bucket/T_MopBucket_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Base Color"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_color() + ]], + uniform texture_2d RMAM = texture_2d("./MI_Bucket/T_MopBucket_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMAM"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_masks() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * Tile); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(BaseColor,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(AlbedoColor.x,AlbedoColor.y,AlbedoColor.z) * float3(Local4.x,Local4.y,Local4.z)); + float4 Local6 = tex::lookup_float4(RMAM,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local6.y; + float Specular_mdl = 0.5; + float Roughness_mdl = Local6.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Bucket/M_CleaningAssets.mdl b/Goods/Props/Household/SM_Bucket/M_CleaningAssets.mdl new file mode 100644 index 0000000000000000000000000000000000000000..f653b9917815a3a52bb0fd4c288cb476ab43714f --- /dev/null +++ b/Goods/Props/Household/SM_Bucket/M_CleaningAssets.mdl @@ -0,0 +1,57 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_CleaningAssets( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_CleaningAssets/T_CleaningAssets_Normal.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_CleaningAssets/T_CleaningAssets_BaseColor.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_CleaningAssets/T_CleaningAssets_Metallic.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local3 = tex::lookup_float4(texture_2d("./M_CleaningAssets/T_CleaningAssets_Roughness.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = float3(Local2.x,Local2.y,Local2.z).x; + float Specular_mdl = 0.5; + float Roughness_mdl = float3(Local3.x,Local3.y,Local3.z).x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Bucket/OmniUe4Base.mdl b/Goods/Props/Household/SM_Bucket/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_Bucket/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_Bucket/OmniUe4Function.mdl b/Goods/Props/Household/SM_Bucket/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_Bucket/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_CP2Bleach1/MI_CleaningProducts2_Inst.mdl b/Goods/Props/Household/SM_CP2Bleach1/MI_CleaningProducts2_Inst.mdl new file mode 100644 index 0000000000000000000000000000000000000000..99004c7fc6a6aa7746ad435a6988fb68ab7acf86 --- /dev/null +++ b/Goods/Props/Household/SM_CP2Bleach1/MI_CleaningProducts2_Inst.mdl @@ -0,0 +1,113 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_CleaningProducts2_Inst( + uniform texture_2d NRM = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("NRM"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Normal_Intensity = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Normal_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d Diff = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_Diff.png",::tex::gamma_srgb) + [[ + anno::display_name("Diff"), + anno::ui_order(32), + sampler_color() + ]], + float Emissive_Intensity = 0.0 + [[ + anno::display_name("Emissive_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d PBR = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("PBR"), + anno::ui_order(32), + sampler_color() + ]], + float Diff_Brightness = 1.0 + [[ + anno::display_name("Diff_Brightness"), + anno::ui_order(32) + ]], + float Roughness_Contrast = 0.0 + [[ + anno::display_name("Roughness_Contrast"), + anno::ui_order(32) + ]], + float Roughness_Multiplier = 1.0 + [[ + anno::display_name("Roughness_Multiplier"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(NRM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local1 = (float3(Local0.x,Local0.y,Local0.z) * float3(Normal_Intensity.x,Normal_Intensity.y,Normal_Intensity.z)); + + float3 Normal_mdl = Local1; + + float4 Local2 = tex::lookup_float4(Diff,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local3 = tex::lookup_float4(PBR,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local4 = math::lerp(0.0,Emissive_Intensity,Local3.z); + float3 Local5 = (float3(Local2.x,Local2.y,Local2.z) * Local4); + float Local6 = math::lerp(3.0,0.0,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x); + float3 Local7 = (float3(Local2.x,Local2.y,Local2.z) * Local6); + float3 Local8 = (Local5 + Local7); + float3 Local9 = math::lerp(float3(0.0,0.0,0.0),Local8,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float3 Local10 = (Diff_Brightness * float3(Local2.x,Local2.y,Local2.z)); + float3 Local11 = math::lerp(float3(0.5,0.5,0.5),Local10,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float Local12 = (0.0 - Roughness_Contrast); + float Local13 = (Roughness_Contrast + 1.0); + float Local14 = math::lerp(Local12,Local13,Local3.y); + float Local15 = math::min(math::max(Local14,0.0),1.0); + float Local16 = (Local15 * Roughness_Multiplier); + + float3 EmissiveColor_mdl = Local9; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local11; + float Metallic_mdl = Local3.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local16; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_CP2Bleach1/OmniUe4Base.mdl b/Goods/Props/Household/SM_CP2Bleach1/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_CP2Bleach1/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_CP2Bleach1/OmniUe4Function.mdl b/Goods/Props/Household/SM_CP2Bleach1/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_CP2Bleach1/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_CP2Bleach1/SM_CP2Bleach1.usd b/Goods/Props/Household/SM_CP2Bleach1/SM_CP2Bleach1.usd new file mode 100644 index 0000000000000000000000000000000000000000..7dbb42f689eba9e49c14ffeee5ab2f9f3c471731 Binary files /dev/null and b/Goods/Props/Household/SM_CP2Bleach1/SM_CP2Bleach1.usd differ diff --git a/Goods/Props/Household/SM_CP2Bleach3/MI_CleaningProducts2_Inst.mdl b/Goods/Props/Household/SM_CP2Bleach3/MI_CleaningProducts2_Inst.mdl new file mode 100644 index 0000000000000000000000000000000000000000..99004c7fc6a6aa7746ad435a6988fb68ab7acf86 --- /dev/null +++ b/Goods/Props/Household/SM_CP2Bleach3/MI_CleaningProducts2_Inst.mdl @@ -0,0 +1,113 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_CleaningProducts2_Inst( + uniform texture_2d NRM = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("NRM"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Normal_Intensity = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Normal_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d Diff = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_Diff.png",::tex::gamma_srgb) + [[ + anno::display_name("Diff"), + anno::ui_order(32), + sampler_color() + ]], + float Emissive_Intensity = 0.0 + [[ + anno::display_name("Emissive_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d PBR = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("PBR"), + anno::ui_order(32), + sampler_color() + ]], + float Diff_Brightness = 1.0 + [[ + anno::display_name("Diff_Brightness"), + anno::ui_order(32) + ]], + float Roughness_Contrast = 0.0 + [[ + anno::display_name("Roughness_Contrast"), + anno::ui_order(32) + ]], + float Roughness_Multiplier = 1.0 + [[ + anno::display_name("Roughness_Multiplier"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(NRM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local1 = (float3(Local0.x,Local0.y,Local0.z) * float3(Normal_Intensity.x,Normal_Intensity.y,Normal_Intensity.z)); + + float3 Normal_mdl = Local1; + + float4 Local2 = tex::lookup_float4(Diff,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local3 = tex::lookup_float4(PBR,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local4 = math::lerp(0.0,Emissive_Intensity,Local3.z); + float3 Local5 = (float3(Local2.x,Local2.y,Local2.z) * Local4); + float Local6 = math::lerp(3.0,0.0,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x); + float3 Local7 = (float3(Local2.x,Local2.y,Local2.z) * Local6); + float3 Local8 = (Local5 + Local7); + float3 Local9 = math::lerp(float3(0.0,0.0,0.0),Local8,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float3 Local10 = (Diff_Brightness * float3(Local2.x,Local2.y,Local2.z)); + float3 Local11 = math::lerp(float3(0.5,0.5,0.5),Local10,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float Local12 = (0.0 - Roughness_Contrast); + float Local13 = (Roughness_Contrast + 1.0); + float Local14 = math::lerp(Local12,Local13,Local3.y); + float Local15 = math::min(math::max(Local14,0.0),1.0); + float Local16 = (Local15 * Roughness_Multiplier); + + float3 EmissiveColor_mdl = Local9; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local11; + float Metallic_mdl = Local3.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local16; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_CP2Bleach3/OmniUe4Base.mdl b/Goods/Props/Household/SM_CP2Bleach3/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_CP2Bleach3/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_CP2Bleach3/OmniUe4Function.mdl b/Goods/Props/Household/SM_CP2Bleach3/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_CP2Bleach3/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_CP2Bleach3/SM_CP2Bleach3.usd b/Goods/Props/Household/SM_CP2Bleach3/SM_CP2Bleach3.usd new file mode 100644 index 0000000000000000000000000000000000000000..89061f430987aecd48eed160e9ac4d055537ed24 Binary files /dev/null and b/Goods/Props/Household/SM_CP2Bleach3/SM_CP2Bleach3.usd differ diff --git a/Goods/Props/Household/SM_CP2Bleach4/MI_CleaningProducts2_Inst.mdl b/Goods/Props/Household/SM_CP2Bleach4/MI_CleaningProducts2_Inst.mdl new file mode 100644 index 0000000000000000000000000000000000000000..99004c7fc6a6aa7746ad435a6988fb68ab7acf86 --- /dev/null +++ b/Goods/Props/Household/SM_CP2Bleach4/MI_CleaningProducts2_Inst.mdl @@ -0,0 +1,113 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_CleaningProducts2_Inst( + uniform texture_2d NRM = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("NRM"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Normal_Intensity = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Normal_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d Diff = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_Diff.png",::tex::gamma_srgb) + [[ + anno::display_name("Diff"), + anno::ui_order(32), + sampler_color() + ]], + float Emissive_Intensity = 0.0 + [[ + anno::display_name("Emissive_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d PBR = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("PBR"), + anno::ui_order(32), + sampler_color() + ]], + float Diff_Brightness = 1.0 + [[ + anno::display_name("Diff_Brightness"), + anno::ui_order(32) + ]], + float Roughness_Contrast = 0.0 + [[ + anno::display_name("Roughness_Contrast"), + anno::ui_order(32) + ]], + float Roughness_Multiplier = 1.0 + [[ + anno::display_name("Roughness_Multiplier"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(NRM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local1 = (float3(Local0.x,Local0.y,Local0.z) * float3(Normal_Intensity.x,Normal_Intensity.y,Normal_Intensity.z)); + + float3 Normal_mdl = Local1; + + float4 Local2 = tex::lookup_float4(Diff,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local3 = tex::lookup_float4(PBR,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local4 = math::lerp(0.0,Emissive_Intensity,Local3.z); + float3 Local5 = (float3(Local2.x,Local2.y,Local2.z) * Local4); + float Local6 = math::lerp(3.0,0.0,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x); + float3 Local7 = (float3(Local2.x,Local2.y,Local2.z) * Local6); + float3 Local8 = (Local5 + Local7); + float3 Local9 = math::lerp(float3(0.0,0.0,0.0),Local8,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float3 Local10 = (Diff_Brightness * float3(Local2.x,Local2.y,Local2.z)); + float3 Local11 = math::lerp(float3(0.5,0.5,0.5),Local10,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float Local12 = (0.0 - Roughness_Contrast); + float Local13 = (Roughness_Contrast + 1.0); + float Local14 = math::lerp(Local12,Local13,Local3.y); + float Local15 = math::min(math::max(Local14,0.0),1.0); + float Local16 = (Local15 * Roughness_Multiplier); + + float3 EmissiveColor_mdl = Local9; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local11; + float Metallic_mdl = Local3.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local16; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_CP2Bleach4/OmniUe4Base.mdl b/Goods/Props/Household/SM_CP2Bleach4/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_CP2Bleach4/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_CP2Bleach4/OmniUe4Function.mdl b/Goods/Props/Household/SM_CP2Bleach4/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_CP2Bleach4/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_CP2Bleach4/SM_CP2Bleach4.usd b/Goods/Props/Household/SM_CP2Bleach4/SM_CP2Bleach4.usd new file mode 100644 index 0000000000000000000000000000000000000000..a307ba8cb31a8f23c9c25f844701383116225248 Binary files /dev/null and b/Goods/Props/Household/SM_CP2Bleach4/SM_CP2Bleach4.usd differ diff --git a/Goods/Props/Household/SM_CP2Softener5/MI_CleaningProducts2_Inst.mdl b/Goods/Props/Household/SM_CP2Softener5/MI_CleaningProducts2_Inst.mdl new file mode 100644 index 0000000000000000000000000000000000000000..99004c7fc6a6aa7746ad435a6988fb68ab7acf86 --- /dev/null +++ b/Goods/Props/Household/SM_CP2Softener5/MI_CleaningProducts2_Inst.mdl @@ -0,0 +1,113 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_CleaningProducts2_Inst( + uniform texture_2d NRM = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("NRM"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Normal_Intensity = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Normal_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d Diff = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_Diff.png",::tex::gamma_srgb) + [[ + anno::display_name("Diff"), + anno::ui_order(32), + sampler_color() + ]], + float Emissive_Intensity = 0.0 + [[ + anno::display_name("Emissive_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d PBR = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("PBR"), + anno::ui_order(32), + sampler_color() + ]], + float Diff_Brightness = 1.0 + [[ + anno::display_name("Diff_Brightness"), + anno::ui_order(32) + ]], + float Roughness_Contrast = 0.0 + [[ + anno::display_name("Roughness_Contrast"), + anno::ui_order(32) + ]], + float Roughness_Multiplier = 1.0 + [[ + anno::display_name("Roughness_Multiplier"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(NRM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local1 = (float3(Local0.x,Local0.y,Local0.z) * float3(Normal_Intensity.x,Normal_Intensity.y,Normal_Intensity.z)); + + float3 Normal_mdl = Local1; + + float4 Local2 = tex::lookup_float4(Diff,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local3 = tex::lookup_float4(PBR,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local4 = math::lerp(0.0,Emissive_Intensity,Local3.z); + float3 Local5 = (float3(Local2.x,Local2.y,Local2.z) * Local4); + float Local6 = math::lerp(3.0,0.0,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x); + float3 Local7 = (float3(Local2.x,Local2.y,Local2.z) * Local6); + float3 Local8 = (Local5 + Local7); + float3 Local9 = math::lerp(float3(0.0,0.0,0.0),Local8,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float3 Local10 = (Diff_Brightness * float3(Local2.x,Local2.y,Local2.z)); + float3 Local11 = math::lerp(float3(0.5,0.5,0.5),Local10,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float Local12 = (0.0 - Roughness_Contrast); + float Local13 = (Roughness_Contrast + 1.0); + float Local14 = math::lerp(Local12,Local13,Local3.y); + float Local15 = math::min(math::max(Local14,0.0),1.0); + float Local16 = (Local15 * Roughness_Multiplier); + + float3 EmissiveColor_mdl = Local9; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local11; + float Metallic_mdl = Local3.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local16; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_CP2Softener5/OmniUe4Base.mdl b/Goods/Props/Household/SM_CP2Softener5/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_CP2Softener5/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_CP2Softener5/OmniUe4Function.mdl b/Goods/Props/Household/SM_CP2Softener5/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_CP2Softener5/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_CP2Softener5/SM_CP2Softener5.usd b/Goods/Props/Household/SM_CP2Softener5/SM_CP2Softener5.usd new file mode 100644 index 0000000000000000000000000000000000000000..0dbf371df9385946cf51b014a79374b9680ad140 Binary files /dev/null and b/Goods/Props/Household/SM_CP2Softener5/SM_CP2Softener5.usd differ diff --git a/Goods/Props/Household/SM_CP2ToiletCleaner2/MI_CleaningProducts2_Inst.mdl b/Goods/Props/Household/SM_CP2ToiletCleaner2/MI_CleaningProducts2_Inst.mdl new file mode 100644 index 0000000000000000000000000000000000000000..99004c7fc6a6aa7746ad435a6988fb68ab7acf86 --- /dev/null +++ b/Goods/Props/Household/SM_CP2ToiletCleaner2/MI_CleaningProducts2_Inst.mdl @@ -0,0 +1,113 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_CleaningProducts2_Inst( + uniform texture_2d NRM = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("NRM"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Normal_Intensity = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Normal_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d Diff = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_Diff.png",::tex::gamma_srgb) + [[ + anno::display_name("Diff"), + anno::ui_order(32), + sampler_color() + ]], + float Emissive_Intensity = 0.0 + [[ + anno::display_name("Emissive_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d PBR = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("PBR"), + anno::ui_order(32), + sampler_color() + ]], + float Diff_Brightness = 1.0 + [[ + anno::display_name("Diff_Brightness"), + anno::ui_order(32) + ]], + float Roughness_Contrast = 0.0 + [[ + anno::display_name("Roughness_Contrast"), + anno::ui_order(32) + ]], + float Roughness_Multiplier = 1.0 + [[ + anno::display_name("Roughness_Multiplier"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(NRM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local1 = (float3(Local0.x,Local0.y,Local0.z) * float3(Normal_Intensity.x,Normal_Intensity.y,Normal_Intensity.z)); + + float3 Normal_mdl = Local1; + + float4 Local2 = tex::lookup_float4(Diff,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local3 = tex::lookup_float4(PBR,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local4 = math::lerp(0.0,Emissive_Intensity,Local3.z); + float3 Local5 = (float3(Local2.x,Local2.y,Local2.z) * Local4); + float Local6 = math::lerp(3.0,0.0,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x); + float3 Local7 = (float3(Local2.x,Local2.y,Local2.z) * Local6); + float3 Local8 = (Local5 + Local7); + float3 Local9 = math::lerp(float3(0.0,0.0,0.0),Local8,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float3 Local10 = (Diff_Brightness * float3(Local2.x,Local2.y,Local2.z)); + float3 Local11 = math::lerp(float3(0.5,0.5,0.5),Local10,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float Local12 = (0.0 - Roughness_Contrast); + float Local13 = (Roughness_Contrast + 1.0); + float Local14 = math::lerp(Local12,Local13,Local3.y); + float Local15 = math::min(math::max(Local14,0.0),1.0); + float Local16 = (Local15 * Roughness_Multiplier); + + float3 EmissiveColor_mdl = Local9; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local11; + float Metallic_mdl = Local3.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local16; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_CP2ToiletCleaner2/OmniUe4Base.mdl b/Goods/Props/Household/SM_CP2ToiletCleaner2/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_CP2ToiletCleaner2/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_CP2ToiletCleaner2/OmniUe4Function.mdl b/Goods/Props/Household/SM_CP2ToiletCleaner2/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_CP2ToiletCleaner2/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_CP2ToiletCleaner2/SM_CP2ToiletCleaner2.usd b/Goods/Props/Household/SM_CP2ToiletCleaner2/SM_CP2ToiletCleaner2.usd new file mode 100644 index 0000000000000000000000000000000000000000..43cbf4976b746eef346759b2dcc8abd8a5cdb5b9 Binary files /dev/null and b/Goods/Props/Household/SM_CP2ToiletCleaner2/SM_CP2ToiletCleaner2.usd differ diff --git a/Goods/Props/Household/SM_CP2WashPowder1/MI_CleaningProducts2_Inst.mdl b/Goods/Props/Household/SM_CP2WashPowder1/MI_CleaningProducts2_Inst.mdl new file mode 100644 index 0000000000000000000000000000000000000000..99004c7fc6a6aa7746ad435a6988fb68ab7acf86 --- /dev/null +++ b/Goods/Props/Household/SM_CP2WashPowder1/MI_CleaningProducts2_Inst.mdl @@ -0,0 +1,113 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_CleaningProducts2_Inst( + uniform texture_2d NRM = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("NRM"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Normal_Intensity = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Normal_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d Diff = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_Diff.png",::tex::gamma_srgb) + [[ + anno::display_name("Diff"), + anno::ui_order(32), + sampler_color() + ]], + float Emissive_Intensity = 0.0 + [[ + anno::display_name("Emissive_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d PBR = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("PBR"), + anno::ui_order(32), + sampler_color() + ]], + float Diff_Brightness = 1.0 + [[ + anno::display_name("Diff_Brightness"), + anno::ui_order(32) + ]], + float Roughness_Contrast = 0.0 + [[ + anno::display_name("Roughness_Contrast"), + anno::ui_order(32) + ]], + float Roughness_Multiplier = 1.0 + [[ + anno::display_name("Roughness_Multiplier"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(NRM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local1 = (float3(Local0.x,Local0.y,Local0.z) * float3(Normal_Intensity.x,Normal_Intensity.y,Normal_Intensity.z)); + + float3 Normal_mdl = Local1; + + float4 Local2 = tex::lookup_float4(Diff,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local3 = tex::lookup_float4(PBR,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local4 = math::lerp(0.0,Emissive_Intensity,Local3.z); + float3 Local5 = (float3(Local2.x,Local2.y,Local2.z) * Local4); + float Local6 = math::lerp(3.0,0.0,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x); + float3 Local7 = (float3(Local2.x,Local2.y,Local2.z) * Local6); + float3 Local8 = (Local5 + Local7); + float3 Local9 = math::lerp(float3(0.0,0.0,0.0),Local8,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float3 Local10 = (Diff_Brightness * float3(Local2.x,Local2.y,Local2.z)); + float3 Local11 = math::lerp(float3(0.5,0.5,0.5),Local10,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float Local12 = (0.0 - Roughness_Contrast); + float Local13 = (Roughness_Contrast + 1.0); + float Local14 = math::lerp(Local12,Local13,Local3.y); + float Local15 = math::min(math::max(Local14,0.0),1.0); + float Local16 = (Local15 * Roughness_Multiplier); + + float3 EmissiveColor_mdl = Local9; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local11; + float Metallic_mdl = Local3.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local16; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_CP2WashPowder1/OmniUe4Base.mdl b/Goods/Props/Household/SM_CP2WashPowder1/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_CP2WashPowder1/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_CP2WashPowder1/OmniUe4Function.mdl b/Goods/Props/Household/SM_CP2WashPowder1/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_CP2WashPowder1/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_CP2WashPowder1/SM_CP2WashPowder1.usd b/Goods/Props/Household/SM_CP2WashPowder1/SM_CP2WashPowder1.usd new file mode 100644 index 0000000000000000000000000000000000000000..44fec708470d7395dcaa6b9eacd2279d8e9819fe Binary files /dev/null and b/Goods/Props/Household/SM_CP2WashPowder1/SM_CP2WashPowder1.usd differ diff --git a/Goods/Props/Household/SM_CP2WashPowder2/MI_CleaningProducts2_Inst.mdl b/Goods/Props/Household/SM_CP2WashPowder2/MI_CleaningProducts2_Inst.mdl new file mode 100644 index 0000000000000000000000000000000000000000..99004c7fc6a6aa7746ad435a6988fb68ab7acf86 --- /dev/null +++ b/Goods/Props/Household/SM_CP2WashPowder2/MI_CleaningProducts2_Inst.mdl @@ -0,0 +1,113 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_CleaningProducts2_Inst( + uniform texture_2d NRM = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("NRM"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Normal_Intensity = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Normal_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d Diff = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_Diff.png",::tex::gamma_srgb) + [[ + anno::display_name("Diff"), + anno::ui_order(32), + sampler_color() + ]], + float Emissive_Intensity = 0.0 + [[ + anno::display_name("Emissive_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d PBR = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("PBR"), + anno::ui_order(32), + sampler_color() + ]], + float Diff_Brightness = 1.0 + [[ + anno::display_name("Diff_Brightness"), + anno::ui_order(32) + ]], + float Roughness_Contrast = 0.0 + [[ + anno::display_name("Roughness_Contrast"), + anno::ui_order(32) + ]], + float Roughness_Multiplier = 1.0 + [[ + anno::display_name("Roughness_Multiplier"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(NRM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local1 = (float3(Local0.x,Local0.y,Local0.z) * float3(Normal_Intensity.x,Normal_Intensity.y,Normal_Intensity.z)); + + float3 Normal_mdl = Local1; + + float4 Local2 = tex::lookup_float4(Diff,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local3 = tex::lookup_float4(PBR,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local4 = math::lerp(0.0,Emissive_Intensity,Local3.z); + float3 Local5 = (float3(Local2.x,Local2.y,Local2.z) * Local4); + float Local6 = math::lerp(3.0,0.0,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x); + float3 Local7 = (float3(Local2.x,Local2.y,Local2.z) * Local6); + float3 Local8 = (Local5 + Local7); + float3 Local9 = math::lerp(float3(0.0,0.0,0.0),Local8,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float3 Local10 = (Diff_Brightness * float3(Local2.x,Local2.y,Local2.z)); + float3 Local11 = math::lerp(float3(0.5,0.5,0.5),Local10,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float Local12 = (0.0 - Roughness_Contrast); + float Local13 = (Roughness_Contrast + 1.0); + float Local14 = math::lerp(Local12,Local13,Local3.y); + float Local15 = math::min(math::max(Local14,0.0),1.0); + float Local16 = (Local15 * Roughness_Multiplier); + + float3 EmissiveColor_mdl = Local9; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local11; + float Metallic_mdl = Local3.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local16; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_CP2WashPowder2/OmniUe4Base.mdl b/Goods/Props/Household/SM_CP2WashPowder2/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_CP2WashPowder2/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_CP2WashPowder2/OmniUe4Function.mdl b/Goods/Props/Household/SM_CP2WashPowder2/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_CP2WashPowder2/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_CP2WashPowder2/SM_CP2WashPowder2.usd b/Goods/Props/Household/SM_CP2WashPowder2/SM_CP2WashPowder2.usd new file mode 100644 index 0000000000000000000000000000000000000000..0d885e9b248be94d62a951fdf76d86b6dc66af07 Binary files /dev/null and b/Goods/Props/Household/SM_CP2WashPowder2/SM_CP2WashPowder2.usd differ diff --git a/Goods/Props/Household/SM_CP2WashPowder3/MI_CleaningProducts2_Inst.mdl b/Goods/Props/Household/SM_CP2WashPowder3/MI_CleaningProducts2_Inst.mdl new file mode 100644 index 0000000000000000000000000000000000000000..99004c7fc6a6aa7746ad435a6988fb68ab7acf86 --- /dev/null +++ b/Goods/Props/Household/SM_CP2WashPowder3/MI_CleaningProducts2_Inst.mdl @@ -0,0 +1,113 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_CleaningProducts2_Inst( + uniform texture_2d NRM = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("NRM"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Normal_Intensity = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Normal_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d Diff = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_Diff.png",::tex::gamma_srgb) + [[ + anno::display_name("Diff"), + anno::ui_order(32), + sampler_color() + ]], + float Emissive_Intensity = 0.0 + [[ + anno::display_name("Emissive_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d PBR = texture_2d("./MI_CleaningProducts2_Inst/T_CleaningProducts02_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("PBR"), + anno::ui_order(32), + sampler_color() + ]], + float Diff_Brightness = 1.0 + [[ + anno::display_name("Diff_Brightness"), + anno::ui_order(32) + ]], + float Roughness_Contrast = 0.0 + [[ + anno::display_name("Roughness_Contrast"), + anno::ui_order(32) + ]], + float Roughness_Multiplier = 1.0 + [[ + anno::display_name("Roughness_Multiplier"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(NRM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local1 = (float3(Local0.x,Local0.y,Local0.z) * float3(Normal_Intensity.x,Normal_Intensity.y,Normal_Intensity.z)); + + float3 Normal_mdl = Local1; + + float4 Local2 = tex::lookup_float4(Diff,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local3 = tex::lookup_float4(PBR,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local4 = math::lerp(0.0,Emissive_Intensity,Local3.z); + float3 Local5 = (float3(Local2.x,Local2.y,Local2.z) * Local4); + float Local6 = math::lerp(3.0,0.0,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x); + float3 Local7 = (float3(Local2.x,Local2.y,Local2.z) * Local6); + float3 Local8 = (Local5 + Local7); + float3 Local9 = math::lerp(float3(0.0,0.0,0.0),Local8,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float3 Local10 = (Diff_Brightness * float3(Local2.x,Local2.y,Local2.z)); + float3 Local11 = math::lerp(float3(0.5,0.5,0.5),Local10,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float Local12 = (0.0 - Roughness_Contrast); + float Local13 = (Roughness_Contrast + 1.0); + float Local14 = math::lerp(Local12,Local13,Local3.y); + float Local15 = math::min(math::max(Local14,0.0),1.0); + float Local16 = (Local15 * Roughness_Multiplier); + + float3 EmissiveColor_mdl = Local9; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local11; + float Metallic_mdl = Local3.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local16; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_CP2WashPowder3/OmniUe4Base.mdl b/Goods/Props/Household/SM_CP2WashPowder3/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_CP2WashPowder3/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_CP2WashPowder3/OmniUe4Function.mdl b/Goods/Props/Household/SM_CP2WashPowder3/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_CP2WashPowder3/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_CP2WashPowder3/SM_CP2WashPowder3.usd b/Goods/Props/Household/SM_CP2WashPowder3/SM_CP2WashPowder3.usd new file mode 100644 index 0000000000000000000000000000000000000000..62dad393b1adecdd653612b862da3ee0b0ed2c75 Binary files /dev/null and b/Goods/Props/Household/SM_CP2WashPowder3/SM_CP2WashPowder3.usd differ diff --git a/Goods/Props/Household/SM_CP3Toothpaste01/MI_CleaningProducts3_Inst.mdl b/Goods/Props/Household/SM_CP3Toothpaste01/MI_CleaningProducts3_Inst.mdl new file mode 100644 index 0000000000000000000000000000000000000000..b53716b3107c9f1de8c5565362f66cef868caf5f --- /dev/null +++ b/Goods/Props/Household/SM_CP3Toothpaste01/MI_CleaningProducts3_Inst.mdl @@ -0,0 +1,113 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_CleaningProducts3_Inst( + uniform texture_2d NRM = texture_2d("./MI_CleaningProducts3_Inst/T_CleaningProducts03_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("NRM"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Normal_Intensity = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Normal_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d Diff = texture_2d("./MI_CleaningProducts3_Inst/T_CleaningProducts03_Diff.png",::tex::gamma_srgb) + [[ + anno::display_name("Diff"), + anno::ui_order(32), + sampler_color() + ]], + float Emissive_Intensity = 0.0 + [[ + anno::display_name("Emissive_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d PBR = texture_2d("./MI_CleaningProducts3_Inst/T_CleaningProducts03_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("PBR"), + anno::ui_order(32), + sampler_color() + ]], + float Diff_Brightness = 1.0 + [[ + anno::display_name("Diff_Brightness"), + anno::ui_order(32) + ]], + float Roughness_Contrast = 0.0 + [[ + anno::display_name("Roughness_Contrast"), + anno::ui_order(32) + ]], + float Roughness_Multiplier = 1.0 + [[ + anno::display_name("Roughness_Multiplier"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(NRM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local1 = (float3(Local0.x,Local0.y,Local0.z) * float3(Normal_Intensity.x,Normal_Intensity.y,Normal_Intensity.z)); + + float3 Normal_mdl = Local1; + + float4 Local2 = tex::lookup_float4(Diff,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local3 = tex::lookup_float4(PBR,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local4 = math::lerp(0.0,Emissive_Intensity,Local3.z); + float3 Local5 = (float3(Local2.x,Local2.y,Local2.z) * Local4); + float Local6 = math::lerp(3.0,0.0,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x); + float3 Local7 = (float3(Local2.x,Local2.y,Local2.z) * Local6); + float3 Local8 = (Local5 + Local7); + float3 Local9 = math::lerp(float3(0.0,0.0,0.0),Local8,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float3 Local10 = (Diff_Brightness * float3(Local2.x,Local2.y,Local2.z)); + float3 Local11 = math::lerp(float3(0.5,0.5,0.5),Local10,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float Local12 = (0.0 - Roughness_Contrast); + float Local13 = (Roughness_Contrast + 1.0); + float Local14 = math::lerp(Local12,Local13,Local3.y); + float Local15 = math::min(math::max(Local14,0.0),1.0); + float Local16 = (Local15 * Roughness_Multiplier); + + float3 EmissiveColor_mdl = Local9; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local11; + float Metallic_mdl = Local3.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local16; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_CP3Toothpaste01/OmniUe4Base.mdl b/Goods/Props/Household/SM_CP3Toothpaste01/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_CP3Toothpaste01/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_CP3Toothpaste01/OmniUe4Function.mdl b/Goods/Props/Household/SM_CP3Toothpaste01/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_CP3Toothpaste01/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_CP3Toothpaste01/SM_CP3Toothpaste01.usd b/Goods/Props/Household/SM_CP3Toothpaste01/SM_CP3Toothpaste01.usd new file mode 100644 index 0000000000000000000000000000000000000000..e8a535522ed94a8863b4766f12e99281141ca922 Binary files /dev/null and b/Goods/Props/Household/SM_CP3Toothpaste01/SM_CP3Toothpaste01.usd differ diff --git a/Goods/Props/Household/SM_CP3Toothpaste02/MI_CleaningProducts3_Inst.mdl b/Goods/Props/Household/SM_CP3Toothpaste02/MI_CleaningProducts3_Inst.mdl new file mode 100644 index 0000000000000000000000000000000000000000..b53716b3107c9f1de8c5565362f66cef868caf5f --- /dev/null +++ b/Goods/Props/Household/SM_CP3Toothpaste02/MI_CleaningProducts3_Inst.mdl @@ -0,0 +1,113 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_CleaningProducts3_Inst( + uniform texture_2d NRM = texture_2d("./MI_CleaningProducts3_Inst/T_CleaningProducts03_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("NRM"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Normal_Intensity = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Normal_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d Diff = texture_2d("./MI_CleaningProducts3_Inst/T_CleaningProducts03_Diff.png",::tex::gamma_srgb) + [[ + anno::display_name("Diff"), + anno::ui_order(32), + sampler_color() + ]], + float Emissive_Intensity = 0.0 + [[ + anno::display_name("Emissive_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d PBR = texture_2d("./MI_CleaningProducts3_Inst/T_CleaningProducts03_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("PBR"), + anno::ui_order(32), + sampler_color() + ]], + float Diff_Brightness = 1.0 + [[ + anno::display_name("Diff_Brightness"), + anno::ui_order(32) + ]], + float Roughness_Contrast = 0.0 + [[ + anno::display_name("Roughness_Contrast"), + anno::ui_order(32) + ]], + float Roughness_Multiplier = 1.0 + [[ + anno::display_name("Roughness_Multiplier"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(NRM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local1 = (float3(Local0.x,Local0.y,Local0.z) * float3(Normal_Intensity.x,Normal_Intensity.y,Normal_Intensity.z)); + + float3 Normal_mdl = Local1; + + float4 Local2 = tex::lookup_float4(Diff,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local3 = tex::lookup_float4(PBR,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local4 = math::lerp(0.0,Emissive_Intensity,Local3.z); + float3 Local5 = (float3(Local2.x,Local2.y,Local2.z) * Local4); + float Local6 = math::lerp(3.0,0.0,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x); + float3 Local7 = (float3(Local2.x,Local2.y,Local2.z) * Local6); + float3 Local8 = (Local5 + Local7); + float3 Local9 = math::lerp(float3(0.0,0.0,0.0),Local8,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float3 Local10 = (Diff_Brightness * float3(Local2.x,Local2.y,Local2.z)); + float3 Local11 = math::lerp(float3(0.5,0.5,0.5),Local10,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float Local12 = (0.0 - Roughness_Contrast); + float Local13 = (Roughness_Contrast + 1.0); + float Local14 = math::lerp(Local12,Local13,Local3.y); + float Local15 = math::min(math::max(Local14,0.0),1.0); + float Local16 = (Local15 * Roughness_Multiplier); + + float3 EmissiveColor_mdl = Local9; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local11; + float Metallic_mdl = Local3.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local16; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_CP3Toothpaste02/OmniUe4Base.mdl b/Goods/Props/Household/SM_CP3Toothpaste02/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_CP3Toothpaste02/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_CP3Toothpaste02/OmniUe4Function.mdl b/Goods/Props/Household/SM_CP3Toothpaste02/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_CP3Toothpaste02/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_CP3Toothpaste02/SM_CP3Toothpaste02.usd b/Goods/Props/Household/SM_CP3Toothpaste02/SM_CP3Toothpaste02.usd new file mode 100644 index 0000000000000000000000000000000000000000..fdd39b4f0246c7eae5a6efc8d84d1562872fc7a5 Binary files /dev/null and b/Goods/Props/Household/SM_CP3Toothpaste02/SM_CP3Toothpaste02.usd differ diff --git a/Goods/Props/Household/SM_CreamCheese01/MI_DairyProducts01_Inst.mdl b/Goods/Props/Household/SM_CreamCheese01/MI_DairyProducts01_Inst.mdl new file mode 100644 index 0000000000000000000000000000000000000000..42d21971bcb499770e217957d0a107ab66effac5 --- /dev/null +++ b/Goods/Props/Household/SM_CreamCheese01/MI_DairyProducts01_Inst.mdl @@ -0,0 +1,113 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_DairyProducts01_Inst( + uniform texture_2d NRM = texture_2d("./MI_DairyProducts01_Inst/T_DairyProducts_01_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("NRM"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Normal_Intensity = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Normal_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d Diff = texture_2d("./MI_DairyProducts01_Inst/T_DairyProducts_01_Diff.png",::tex::gamma_srgb) + [[ + anno::display_name("Diff"), + anno::ui_order(32), + sampler_color() + ]], + float Emissive_Intensity = 0.0 + [[ + anno::display_name("Emissive_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d PBR = texture_2d("./MI_DairyProducts01_Inst/T_DairyProducts_01_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("PBR"), + anno::ui_order(32), + sampler_color() + ]], + float Diff_Brightness = 1.0 + [[ + anno::display_name("Diff_Brightness"), + anno::ui_order(32) + ]], + float Roughness_Contrast = 0.0 + [[ + anno::display_name("Roughness_Contrast"), + anno::ui_order(32) + ]], + float Roughness_Multiplier = 1.0 + [[ + anno::display_name("Roughness_Multiplier"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(NRM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local1 = (float3(Local0.x,Local0.y,Local0.z) * float3(Normal_Intensity.x,Normal_Intensity.y,Normal_Intensity.z)); + + float3 Normal_mdl = Local1; + + float4 Local2 = tex::lookup_float4(Diff,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local3 = tex::lookup_float4(PBR,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local4 = math::lerp(0.0,Emissive_Intensity,Local3.z); + float3 Local5 = (float3(Local2.x,Local2.y,Local2.z) * Local4); + float Local6 = math::lerp(3.0,0.0,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x); + float3 Local7 = (float3(Local2.x,Local2.y,Local2.z) * Local6); + float3 Local8 = (Local5 + Local7); + float3 Local9 = math::lerp(float3(0.0,0.0,0.0),Local8,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float3 Local10 = (Diff_Brightness * float3(Local2.x,Local2.y,Local2.z)); + float3 Local11 = math::lerp(float3(0.5,0.5,0.5),Local10,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float Local12 = (0.0 - Roughness_Contrast); + float Local13 = (Roughness_Contrast + 1.0); + float Local14 = math::lerp(Local12,Local13,Local3.y); + float Local15 = math::min(math::max(Local14,0.0),1.0); + float Local16 = (Local15 * Roughness_Multiplier); + + float3 EmissiveColor_mdl = Local9; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local11; + float Metallic_mdl = Local3.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local16; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_CreamCheese01/OmniUe4Base.mdl b/Goods/Props/Household/SM_CreamCheese01/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_CreamCheese01/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_CreamCheese01/OmniUe4Function.mdl b/Goods/Props/Household/SM_CreamCheese01/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_CreamCheese01/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_CreamCheese01/SM_CreamCheese01.usd b/Goods/Props/Household/SM_CreamCheese01/SM_CreamCheese01.usd new file mode 100644 index 0000000000000000000000000000000000000000..956b38a9618b9b0fb8c330b1de13caddbf189350 Binary files /dev/null and b/Goods/Props/Household/SM_CreamCheese01/SM_CreamCheese01.usd differ diff --git a/Goods/Props/Household/SM_Detergent_Bag_01/MI_DetergentBag_01.mdl b/Goods/Props/Household/SM_Detergent_Bag_01/MI_DetergentBag_01.mdl new file mode 100644 index 0000000000000000000000000000000000000000..4c538c3a65da32f380c9391d70257a74f05d59f3 --- /dev/null +++ b/Goods/Props/Household/SM_Detergent_Bag_01/MI_DetergentBag_01.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_DetergentBag_01( + uniform texture_2d Normal = texture_2d("./MI_DetergentBag_01/T_Detergent_Bag_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_DetergentBag_01/T_DetergentBag_01.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_DetergentBag_01/T_Detergent_Bag_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Detergent_Bag_01/MI_DetergentBag_02.mdl b/Goods/Props/Household/SM_Detergent_Bag_01/MI_DetergentBag_02.mdl new file mode 100644 index 0000000000000000000000000000000000000000..af14fff257be349dd0b5fafd05aa83645d2d95bb --- /dev/null +++ b/Goods/Props/Household/SM_Detergent_Bag_01/MI_DetergentBag_02.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_DetergentBag_02( + uniform texture_2d Normal = texture_2d("./MI_DetergentBag_02/T_Detergent_Bag_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_DetergentBag_02/T_DetergentBag_02.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_DetergentBag_02/T_Detergent_Bag_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Detergent_Bag_01/MI_DetergentBag_03.mdl b/Goods/Props/Household/SM_Detergent_Bag_01/MI_DetergentBag_03.mdl new file mode 100644 index 0000000000000000000000000000000000000000..91bb1301a1d511de4582d8fe58b58d5287f7e37a --- /dev/null +++ b/Goods/Props/Household/SM_Detergent_Bag_01/MI_DetergentBag_03.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_DetergentBag_03( + uniform texture_2d Normal = texture_2d("./MI_DetergentBag_03/T_Detergent_Bag_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_DetergentBag_03/T_DetergentBag_03.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_DetergentBag_03/T_Detergent_Bag_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Detergent_Bag_01/MI_DetergentBag_04.mdl b/Goods/Props/Household/SM_Detergent_Bag_01/MI_DetergentBag_04.mdl new file mode 100644 index 0000000000000000000000000000000000000000..08dbf2abd288086eecb0eeabf06c421d579a2431 --- /dev/null +++ b/Goods/Props/Household/SM_Detergent_Bag_01/MI_DetergentBag_04.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_DetergentBag_04( + uniform texture_2d Normal = texture_2d("./MI_DetergentBag_04/T_Detergent_Bag_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_DetergentBag_04/T_DetergentBag_04.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_DetergentBag_04/T_Detergent_Bag_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Detergent_Bag_01/MI_DetergentBag_05.mdl b/Goods/Props/Household/SM_Detergent_Bag_01/MI_DetergentBag_05.mdl new file mode 100644 index 0000000000000000000000000000000000000000..fc35072c50071fa1247db69ec3eb67ef59f67f14 --- /dev/null +++ b/Goods/Props/Household/SM_Detergent_Bag_01/MI_DetergentBag_05.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_DetergentBag_05( + uniform texture_2d Normal = texture_2d("./MI_DetergentBag_05/T_Detergent_Bag_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_DetergentBag_05/T_DetergentBag_05.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_DetergentBag_05/T_Detergent_Bag_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Detergent_Bag_01/OmniUe4Base.mdl b/Goods/Props/Household/SM_Detergent_Bag_01/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_Detergent_Bag_01/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_Detergent_Bag_01/OmniUe4Function.mdl b/Goods/Props/Household/SM_Detergent_Bag_01/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_Detergent_Bag_01/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_Detergent_Bag_01/SM_Detergent_Bag_01.usd b/Goods/Props/Household/SM_Detergent_Bag_01/SM_Detergent_Bag_01.usd new file mode 100644 index 0000000000000000000000000000000000000000..a58e81410f33b5ba6b090b936827cdf465949c5f Binary files /dev/null and b/Goods/Props/Household/SM_Detergent_Bag_01/SM_Detergent_Bag_01.usd differ diff --git a/Goods/Props/Household/SM_Hairdye/MI_Hairdye_001.mdl b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_001.mdl new file mode 100644 index 0000000000000000000000000000000000000000..d9fdc4f73520a9050b38057406d5afa0a8c28ef0 --- /dev/null +++ b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_001.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Hairdye_001( + uniform texture_2d Normal = texture_2d("./MI_Hairdye_001/T_sticks_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Hairdye_001/T_Hairdye_01.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Hairdye_001/T_sticks_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Hairdye/MI_Hairdye_002.mdl b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_002.mdl new file mode 100644 index 0000000000000000000000000000000000000000..db809ef05cecc450d61fe9ddd7ae88a3c6e0d907 --- /dev/null +++ b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_002.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Hairdye_002( + uniform texture_2d Normal = texture_2d("./MI_Hairdye_002/T_sticks_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Hairdye_002/T_Hairdye_02.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Hairdye_002/T_sticks_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Hairdye/MI_Hairdye_003.mdl b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_003.mdl new file mode 100644 index 0000000000000000000000000000000000000000..72fe519f6e6730dbf42c57671411b95e0aab11cf --- /dev/null +++ b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_003.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Hairdye_003( + uniform texture_2d Normal = texture_2d("./MI_Hairdye_003/T_sticks_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Hairdye_003/T_Hairdye_03.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Hairdye_003/T_sticks_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Hairdye/MI_Hairdye_004.mdl b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_004.mdl new file mode 100644 index 0000000000000000000000000000000000000000..b2cb0c87cc59c1c4fe57c865014bc8fe450b7629 --- /dev/null +++ b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_004.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Hairdye_004( + uniform texture_2d Normal = texture_2d("./MI_Hairdye_004/T_sticks_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Hairdye_004/T_Hairdye_04.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Hairdye_004/T_sticks_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Hairdye/MI_Hairdye_005.mdl b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_005.mdl new file mode 100644 index 0000000000000000000000000000000000000000..5d581c45f62e2fa015b15da821290347f114b45a --- /dev/null +++ b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_005.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Hairdye_005( + uniform texture_2d Normal = texture_2d("./MI_Hairdye_005/T_Tissuebox_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Hairdye_005/T_Hairdye_05.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Hairdye_005/T_sticks_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Hairdye/MI_Hairdye_006.mdl b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_006.mdl new file mode 100644 index 0000000000000000000000000000000000000000..09fc3ccede11412d9393d38cac17618a83413ead --- /dev/null +++ b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_006.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Hairdye_006( + uniform texture_2d Normal = texture_2d("./MI_Hairdye_006/T_sticks_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Hairdye_006/T_Hairdye_06.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Hairdye_006/T_sticks_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Hairdye/MI_Hairdye_007.mdl b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_007.mdl new file mode 100644 index 0000000000000000000000000000000000000000..95f1c89e47c7e69009b40f666cc254f71d791f62 --- /dev/null +++ b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_007.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Hairdye_007( + uniform texture_2d Normal = texture_2d("./MI_Hairdye_007/T_sticks_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Hairdye_007/T_Hairdye_07.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Hairdye_007/T_sticks_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Hairdye/MI_Hairdye_008.mdl b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_008.mdl new file mode 100644 index 0000000000000000000000000000000000000000..6f5bfc1df45f413a19c720c9f3a4e9166247fde2 --- /dev/null +++ b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_008.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Hairdye_008( + uniform texture_2d Normal = texture_2d("./MI_Hairdye_008/T_sticks_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Hairdye_008/T_Hairdye_08.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Hairdye_008/T_sticks_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Hairdye/MI_Hairdye_009.mdl b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_009.mdl new file mode 100644 index 0000000000000000000000000000000000000000..296d6d84f8b76f5949195f7885918de1e58b5d50 --- /dev/null +++ b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_009.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Hairdye_009( + uniform texture_2d Normal = texture_2d("./MI_Hairdye_009/T_sticks_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Hairdye_009/T_Hairdye_09.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Hairdye_009/T_sticks_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Hairdye/MI_Hairdye_010.mdl b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_010.mdl new file mode 100644 index 0000000000000000000000000000000000000000..0cf463f6768d8a0a84d4544b80f36a0bf6380e1a --- /dev/null +++ b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_010.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Hairdye_010( + uniform texture_2d Normal = texture_2d("./MI_Hairdye_010/T_sticks_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Hairdye_010/T_Hairdye_10.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Hairdye_010/T_sticks_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Hairdye/MI_Hairdye_011.mdl b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_011.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a62fd202d4e2409b36d8239ac2da75572ae5baa4 --- /dev/null +++ b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_011.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Hairdye_011( + uniform texture_2d Normal = texture_2d("./MI_Hairdye_011/T_sticks_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Hairdye_011/T_Hairdye_11.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Hairdye_011/T_sticks_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Hairdye/MI_Hairdye_012.mdl b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_012.mdl new file mode 100644 index 0000000000000000000000000000000000000000..3e08f8a039489e99b75a84721027628063c9259f --- /dev/null +++ b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_012.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Hairdye_012( + uniform texture_2d Normal = texture_2d("./MI_Hairdye_012/T_sticks_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Hairdye_012/T_Hairdye_12.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Hairdye_012/T_sticks_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Hairdye/MI_Hairdye_013.mdl b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_013.mdl new file mode 100644 index 0000000000000000000000000000000000000000..c19397df59d3343b3da253920c9c02ee94aed103 --- /dev/null +++ b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_013.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Hairdye_013( + uniform texture_2d Normal = texture_2d("./MI_Hairdye_013/T_sticks_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Hairdye_013/T_Hairdye_13.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Hairdye_013/T_sticks_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Hairdye/MI_Hairdye_014.mdl b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_014.mdl new file mode 100644 index 0000000000000000000000000000000000000000..1040d9b5b227bf9c5453d67032c3a905fc0320f7 --- /dev/null +++ b/Goods/Props/Household/SM_Hairdye/MI_Hairdye_014.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Hairdye_014( + uniform texture_2d Normal = texture_2d("./MI_Hairdye_014/T_sticks_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Hairdye_014/T_Hairdye_14.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Hairdye_014/T_sticks_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Hairdye/OmniUe4Base.mdl b/Goods/Props/Household/SM_Hairdye/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_Hairdye/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_Hairdye/OmniUe4Function.mdl b/Goods/Props/Household/SM_Hairdye/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_Hairdye/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_Hairdye/SM_Hairdye.usd b/Goods/Props/Household/SM_Hairdye/SM_Hairdye.usd new file mode 100644 index 0000000000000000000000000000000000000000..9eab71c952a95e7da7e9a62b1aec1d342abc7ae3 Binary files /dev/null and b/Goods/Props/Household/SM_Hairdye/SM_Hairdye.usd differ diff --git a/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_01.mdl b/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_01.mdl new file mode 100644 index 0000000000000000000000000000000000000000..2bf5b379b7b2f3afdcbd5c4178d1443def18ba8b --- /dev/null +++ b/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_01.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_MaskBag_01( + uniform texture_2d Normal = texture_2d("./MI_MaskBag_01/T_Maskbag_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_MaskBag_01/T_Masks_01.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_MaskBag_01/T_Maskbag_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_02.mdl b/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_02.mdl new file mode 100644 index 0000000000000000000000000000000000000000..cfe78da368538d757805e2f7a00e755aeaac2180 --- /dev/null +++ b/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_02.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_MaskBag_02( + uniform texture_2d Normal = texture_2d("./MI_MaskBag_02/T_Maskbag_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_MaskBag_02/T_Masks_02.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_MaskBag_02/T_Maskbag_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_03.mdl b/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_03.mdl new file mode 100644 index 0000000000000000000000000000000000000000..744bae6fc1ae126c9fa29c9b1a6f5fdeefcf7422 --- /dev/null +++ b/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_03.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_MaskBag_03( + uniform texture_2d Normal = texture_2d("./MI_MaskBag_03/T_Maskbag_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_MaskBag_03/T_Masks_03.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_MaskBag_03/T_Maskbag_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_04.mdl b/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_04.mdl new file mode 100644 index 0000000000000000000000000000000000000000..b2a24969c4609e57627684ac619c21aa7dfd1973 --- /dev/null +++ b/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_04.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_MaskBag_04( + uniform texture_2d Normal = texture_2d("./MI_MaskBag_04/T_Maskbag_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_MaskBag_04/T_Masks_04.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_MaskBag_04/T_Maskbag_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_05.mdl b/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_05.mdl new file mode 100644 index 0000000000000000000000000000000000000000..edd01904336c3f10e5c1a4eefe9d2c117ee98b8f --- /dev/null +++ b/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_05.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_MaskBag_05( + uniform texture_2d Normal = texture_2d("./MI_MaskBag_05/T_Maskbag_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_MaskBag_05/T_Masks_05.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_MaskBag_05/T_Maskbag_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_06.mdl b/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_06.mdl new file mode 100644 index 0000000000000000000000000000000000000000..3b417195c139e01606c95844bd74e0d1ac1e76dc --- /dev/null +++ b/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_06.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_MaskBag_06( + uniform texture_2d Normal = texture_2d("./MI_MaskBag_06/T_Maskbag_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_MaskBag_06/T_Masks_06.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_MaskBag_06/T_Maskbag_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_07.mdl b/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_07.mdl new file mode 100644 index 0000000000000000000000000000000000000000..fec36d296cfffd1d8361d693d9c3dc801b2e0bea --- /dev/null +++ b/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_07.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_MaskBag_07( + uniform texture_2d Normal = texture_2d("./MI_MaskBag_07/T_Maskbag_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_MaskBag_07/T_Masks_07.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_MaskBag_07/T_Maskbag_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_08.mdl b/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_08.mdl new file mode 100644 index 0000000000000000000000000000000000000000..7ef3ff3155d7f5ce9604a547f095c08e66c35923 --- /dev/null +++ b/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_08.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_MaskBag_08( + uniform texture_2d Normal = texture_2d("./MI_MaskBag_08/T_Maskbag_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_MaskBag_08/T_Masks_08.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_MaskBag_08/T_Maskbag_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_09.mdl b/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_09.mdl new file mode 100644 index 0000000000000000000000000000000000000000..615de1ca0fdc5362cebec9d8046c497f7a1b31f9 --- /dev/null +++ b/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_09.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_MaskBag_09( + uniform texture_2d Normal = texture_2d("./MI_MaskBag_09/T_Maskbag_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_MaskBag_09/T_Masks_09.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_MaskBag_09/T_Maskbag_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_10.mdl b/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_10.mdl new file mode 100644 index 0000000000000000000000000000000000000000..773583e2466e8f099607872af8e4afe09567d7e6 --- /dev/null +++ b/Goods/Props/Household/SM_Maskbag_01/MI_MaskBag_10.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_MaskBag_10( + uniform texture_2d Normal = texture_2d("./MI_MaskBag_10/T_Maskbag_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_MaskBag_10/T_Masks_10.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_MaskBag_10/T_Maskbag_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Maskbag_01/OmniUe4Base.mdl b/Goods/Props/Household/SM_Maskbag_01/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_Maskbag_01/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_Maskbag_01/OmniUe4Function.mdl b/Goods/Props/Household/SM_Maskbag_01/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_Maskbag_01/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_Maskbag_01/SM_Maskbag_01.usd b/Goods/Props/Household/SM_Maskbag_01/SM_Maskbag_01.usd new file mode 100644 index 0000000000000000000000000000000000000000..20be6db72bb7c24fe7fc905c7adc8d3510df0cd2 Binary files /dev/null and b/Goods/Props/Household/SM_Maskbag_01/SM_Maskbag_01.usd differ diff --git a/Goods/Props/Household/SM_Mop/MI_Bucket.mdl b/Goods/Props/Household/SM_Mop/MI_Bucket.mdl new file mode 100644 index 0000000000000000000000000000000000000000..217c75b98efdf77a81fc9bca493c98e2f6809c38 --- /dev/null +++ b/Goods/Props/Household/SM_Mop/MI_Bucket.mdl @@ -0,0 +1,99 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Bucket( + float Tile = 1.0 + [[ + anno::display_name("Tile"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + uniform texture_2d Normal = texture_2d("./MI_Bucket/T_MopBucket_N.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_normal() + ]], + float NormalIntensity = 1.0 + [[ + anno::display_name("Normal Intensity"), + anno::ui_order(32), + anno::in_group("Textures") + ]], + float4 AlbedoColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Albedo Color"), + anno::ui_order(32), + anno::in_group("Coloring") + ]], + uniform texture_2d BaseColor = texture_2d("./MI_Bucket/T_MopBucket_BC.png",::tex::gamma_srgb) + [[ + anno::display_name("Base Color"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_color() + ]], + uniform texture_2d RMAM = texture_2d("./MI_Bucket/T_MopBucket_RMA.png",::tex::gamma_linear) + [[ + anno::display_name("RMAM"), + anno::ui_order(32), + anno::in_group("Textures"), + sampler_masks() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float2 Local0 = (CustomizedUV0_mdl * Tile); + float4 Local1 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat)); + float Local2 = (1.0 - NormalIntensity); + float3 Local3 = math::lerp(float3(Local1.x,Local1.y,Local1.z),float3(0.0,0.0,1.0),Local2); + + float3 Normal_mdl = Local3; + + float4 Local4 = tex::lookup_float4(BaseColor,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(AlbedoColor.x,AlbedoColor.y,AlbedoColor.z) * float3(Local4.x,Local4.y,Local4.z)); + float4 Local6 = tex::lookup_float4(RMAM,float2(Local0.x,1.0-Local0.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local5; + float Metallic_mdl = Local6.y; + float Specular_mdl = 0.5; + float Roughness_mdl = Local6.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Mop/M_CleaningAssets.mdl b/Goods/Props/Household/SM_Mop/M_CleaningAssets.mdl new file mode 100644 index 0000000000000000000000000000000000000000..f653b9917815a3a52bb0fd4c288cb476ab43714f --- /dev/null +++ b/Goods/Props/Household/SM_Mop/M_CleaningAssets.mdl @@ -0,0 +1,57 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_CleaningAssets( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_CleaningAssets/T_CleaningAssets_Normal.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_CleaningAssets/T_CleaningAssets_BaseColor.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_CleaningAssets/T_CleaningAssets_Metallic.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local3 = tex::lookup_float4(texture_2d("./M_CleaningAssets/T_CleaningAssets_Roughness.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = float3(Local2.x,Local2.y,Local2.z).x; + float Specular_mdl = 0.5; + float Roughness_mdl = float3(Local3.x,Local3.y,Local3.z).x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Mop/OmniUe4Base.mdl b/Goods/Props/Household/SM_Mop/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_Mop/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_Mop/OmniUe4Function.mdl b/Goods/Props/Household/SM_Mop/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_Mop/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_Mop/SM_Mop.usd b/Goods/Props/Household/SM_Mop/SM_Mop.usd new file mode 100644 index 0000000000000000000000000000000000000000..723b63637b3e33d2911080d42752c36ba8a36615 Binary files /dev/null and b/Goods/Props/Household/SM_Mop/SM_Mop.usd differ diff --git a/Goods/Props/Household/SM_SPDiaper1/MI_SanitaryProducts_Inst.mdl b/Goods/Props/Household/SM_SPDiaper1/MI_SanitaryProducts_Inst.mdl new file mode 100644 index 0000000000000000000000000000000000000000..883adfe0c7c9cda0ebb1103f3e8fb8455f98510e --- /dev/null +++ b/Goods/Props/Household/SM_SPDiaper1/MI_SanitaryProducts_Inst.mdl @@ -0,0 +1,113 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_SanitaryProducts_Inst( + uniform texture_2d NRM = texture_2d("./MI_SanitaryProducts_Inst/T_SanitaryProducts_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("NRM"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Normal_Intensity = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Normal_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d Diff = texture_2d("./MI_SanitaryProducts_Inst/T_SanitaryProducts_Diff.png",::tex::gamma_srgb) + [[ + anno::display_name("Diff"), + anno::ui_order(32), + sampler_color() + ]], + float Emissive_Intensity = 0.0 + [[ + anno::display_name("Emissive_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d PBR = texture_2d("./MI_SanitaryProducts_Inst/T_SanitaryProducts_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("PBR"), + anno::ui_order(32), + sampler_color() + ]], + float Diff_Brightness = 1.0 + [[ + anno::display_name("Diff_Brightness"), + anno::ui_order(32) + ]], + float Roughness_Contrast = 0.0 + [[ + anno::display_name("Roughness_Contrast"), + anno::ui_order(32) + ]], + float Roughness_Multiplier = 1.0 + [[ + anno::display_name("Roughness_Multiplier"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(NRM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local1 = (float3(Local0.x,Local0.y,Local0.z) * float3(Normal_Intensity.x,Normal_Intensity.y,Normal_Intensity.z)); + + float3 Normal_mdl = Local1; + + float4 Local2 = tex::lookup_float4(Diff,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local3 = tex::lookup_float4(PBR,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local4 = math::lerp(0.0,Emissive_Intensity,Local3.z); + float3 Local5 = (float3(Local2.x,Local2.y,Local2.z) * Local4); + float Local6 = math::lerp(3.0,0.0,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x); + float3 Local7 = (float3(Local2.x,Local2.y,Local2.z) * Local6); + float3 Local8 = (Local5 + Local7); + float3 Local9 = math::lerp(float3(0.0,0.0,0.0),Local8,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float3 Local10 = (Diff_Brightness * float3(Local2.x,Local2.y,Local2.z)); + float3 Local11 = math::lerp(float3(0.5,0.5,0.5),Local10,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float Local12 = (0.0 - Roughness_Contrast); + float Local13 = (Roughness_Contrast + 1.0); + float Local14 = math::lerp(Local12,Local13,Local3.y); + float Local15 = math::min(math::max(Local14,0.0),1.0); + float Local16 = (Local15 * Roughness_Multiplier); + + float3 EmissiveColor_mdl = Local9; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local11; + float Metallic_mdl = Local3.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local16; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_SPDiaper1/OmniUe4Base.mdl b/Goods/Props/Household/SM_SPDiaper1/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_SPDiaper1/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_SPDiaper1/OmniUe4Function.mdl b/Goods/Props/Household/SM_SPDiaper1/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_SPDiaper1/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_SPDiaper1/SM_SPDiaper1.usd b/Goods/Props/Household/SM_SPDiaper1/SM_SPDiaper1.usd new file mode 100644 index 0000000000000000000000000000000000000000..452cd06a5edbdac5e4fffe1e015445521aa56a0c Binary files /dev/null and b/Goods/Props/Household/SM_SPDiaper1/SM_SPDiaper1.usd differ diff --git a/Goods/Props/Household/SM_SPDiaper2/MI_SanitaryProducts_Inst.mdl b/Goods/Props/Household/SM_SPDiaper2/MI_SanitaryProducts_Inst.mdl new file mode 100644 index 0000000000000000000000000000000000000000..883adfe0c7c9cda0ebb1103f3e8fb8455f98510e --- /dev/null +++ b/Goods/Props/Household/SM_SPDiaper2/MI_SanitaryProducts_Inst.mdl @@ -0,0 +1,113 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_SanitaryProducts_Inst( + uniform texture_2d NRM = texture_2d("./MI_SanitaryProducts_Inst/T_SanitaryProducts_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("NRM"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Normal_Intensity = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Normal_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d Diff = texture_2d("./MI_SanitaryProducts_Inst/T_SanitaryProducts_Diff.png",::tex::gamma_srgb) + [[ + anno::display_name("Diff"), + anno::ui_order(32), + sampler_color() + ]], + float Emissive_Intensity = 0.0 + [[ + anno::display_name("Emissive_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d PBR = texture_2d("./MI_SanitaryProducts_Inst/T_SanitaryProducts_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("PBR"), + anno::ui_order(32), + sampler_color() + ]], + float Diff_Brightness = 1.0 + [[ + anno::display_name("Diff_Brightness"), + anno::ui_order(32) + ]], + float Roughness_Contrast = 0.0 + [[ + anno::display_name("Roughness_Contrast"), + anno::ui_order(32) + ]], + float Roughness_Multiplier = 1.0 + [[ + anno::display_name("Roughness_Multiplier"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(NRM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local1 = (float3(Local0.x,Local0.y,Local0.z) * float3(Normal_Intensity.x,Normal_Intensity.y,Normal_Intensity.z)); + + float3 Normal_mdl = Local1; + + float4 Local2 = tex::lookup_float4(Diff,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local3 = tex::lookup_float4(PBR,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local4 = math::lerp(0.0,Emissive_Intensity,Local3.z); + float3 Local5 = (float3(Local2.x,Local2.y,Local2.z) * Local4); + float Local6 = math::lerp(3.0,0.0,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x); + float3 Local7 = (float3(Local2.x,Local2.y,Local2.z) * Local6); + float3 Local8 = (Local5 + Local7); + float3 Local9 = math::lerp(float3(0.0,0.0,0.0),Local8,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float3 Local10 = (Diff_Brightness * float3(Local2.x,Local2.y,Local2.z)); + float3 Local11 = math::lerp(float3(0.5,0.5,0.5),Local10,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float Local12 = (0.0 - Roughness_Contrast); + float Local13 = (Roughness_Contrast + 1.0); + float Local14 = math::lerp(Local12,Local13,Local3.y); + float Local15 = math::min(math::max(Local14,0.0),1.0); + float Local16 = (Local15 * Roughness_Multiplier); + + float3 EmissiveColor_mdl = Local9; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local11; + float Metallic_mdl = Local3.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local16; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_SPDiaper2/OmniUe4Base.mdl b/Goods/Props/Household/SM_SPDiaper2/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_SPDiaper2/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_SPDiaper2/OmniUe4Function.mdl b/Goods/Props/Household/SM_SPDiaper2/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_SPDiaper2/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_SPDiaper2/SM_SPDiaper2.usd b/Goods/Props/Household/SM_SPDiaper2/SM_SPDiaper2.usd new file mode 100644 index 0000000000000000000000000000000000000000..ddd45af88dbec7cfb02fca9d3224551aa9f7c23c Binary files /dev/null and b/Goods/Props/Household/SM_SPDiaper2/SM_SPDiaper2.usd differ diff --git a/Goods/Props/Household/SM_SPDiaper6/MI_SanitaryProducts_Inst.mdl b/Goods/Props/Household/SM_SPDiaper6/MI_SanitaryProducts_Inst.mdl new file mode 100644 index 0000000000000000000000000000000000000000..883adfe0c7c9cda0ebb1103f3e8fb8455f98510e --- /dev/null +++ b/Goods/Props/Household/SM_SPDiaper6/MI_SanitaryProducts_Inst.mdl @@ -0,0 +1,113 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_SanitaryProducts_Inst( + uniform texture_2d NRM = texture_2d("./MI_SanitaryProducts_Inst/T_SanitaryProducts_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("NRM"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Normal_Intensity = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Normal_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d Diff = texture_2d("./MI_SanitaryProducts_Inst/T_SanitaryProducts_Diff.png",::tex::gamma_srgb) + [[ + anno::display_name("Diff"), + anno::ui_order(32), + sampler_color() + ]], + float Emissive_Intensity = 0.0 + [[ + anno::display_name("Emissive_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d PBR = texture_2d("./MI_SanitaryProducts_Inst/T_SanitaryProducts_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("PBR"), + anno::ui_order(32), + sampler_color() + ]], + float Diff_Brightness = 1.0 + [[ + anno::display_name("Diff_Brightness"), + anno::ui_order(32) + ]], + float Roughness_Contrast = 0.0 + [[ + anno::display_name("Roughness_Contrast"), + anno::ui_order(32) + ]], + float Roughness_Multiplier = 1.0 + [[ + anno::display_name("Roughness_Multiplier"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(NRM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local1 = (float3(Local0.x,Local0.y,Local0.z) * float3(Normal_Intensity.x,Normal_Intensity.y,Normal_Intensity.z)); + + float3 Normal_mdl = Local1; + + float4 Local2 = tex::lookup_float4(Diff,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local3 = tex::lookup_float4(PBR,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local4 = math::lerp(0.0,Emissive_Intensity,Local3.z); + float3 Local5 = (float3(Local2.x,Local2.y,Local2.z) * Local4); + float Local6 = math::lerp(3.0,0.0,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x); + float3 Local7 = (float3(Local2.x,Local2.y,Local2.z) * Local6); + float3 Local8 = (Local5 + Local7); + float3 Local9 = math::lerp(float3(0.0,0.0,0.0),Local8,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float3 Local10 = (Diff_Brightness * float3(Local2.x,Local2.y,Local2.z)); + float3 Local11 = math::lerp(float3(0.5,0.5,0.5),Local10,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float Local12 = (0.0 - Roughness_Contrast); + float Local13 = (Roughness_Contrast + 1.0); + float Local14 = math::lerp(Local12,Local13,Local3.y); + float Local15 = math::min(math::max(Local14,0.0),1.0); + float Local16 = (Local15 * Roughness_Multiplier); + + float3 EmissiveColor_mdl = Local9; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local11; + float Metallic_mdl = Local3.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local16; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_SPDiaper6/OmniUe4Base.mdl b/Goods/Props/Household/SM_SPDiaper6/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_SPDiaper6/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_SPDiaper6/OmniUe4Function.mdl b/Goods/Props/Household/SM_SPDiaper6/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_SPDiaper6/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_SPDiaper6/SM_SPDiaper6.usd b/Goods/Props/Household/SM_SPDiaper6/SM_SPDiaper6.usd new file mode 100644 index 0000000000000000000000000000000000000000..ec1feb9f217900516ec650df99afa8fa4455e4ed Binary files /dev/null and b/Goods/Props/Household/SM_SPDiaper6/SM_SPDiaper6.usd differ diff --git a/Goods/Props/Household/SM_SPDiaper7/MI_SanitaryProducts_Inst.mdl b/Goods/Props/Household/SM_SPDiaper7/MI_SanitaryProducts_Inst.mdl new file mode 100644 index 0000000000000000000000000000000000000000..883adfe0c7c9cda0ebb1103f3e8fb8455f98510e --- /dev/null +++ b/Goods/Props/Household/SM_SPDiaper7/MI_SanitaryProducts_Inst.mdl @@ -0,0 +1,113 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_SanitaryProducts_Inst( + uniform texture_2d NRM = texture_2d("./MI_SanitaryProducts_Inst/T_SanitaryProducts_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("NRM"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Normal_Intensity = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Normal_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d Diff = texture_2d("./MI_SanitaryProducts_Inst/T_SanitaryProducts_Diff.png",::tex::gamma_srgb) + [[ + anno::display_name("Diff"), + anno::ui_order(32), + sampler_color() + ]], + float Emissive_Intensity = 0.0 + [[ + anno::display_name("Emissive_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d PBR = texture_2d("./MI_SanitaryProducts_Inst/T_SanitaryProducts_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("PBR"), + anno::ui_order(32), + sampler_color() + ]], + float Diff_Brightness = 1.0 + [[ + anno::display_name("Diff_Brightness"), + anno::ui_order(32) + ]], + float Roughness_Contrast = 0.0 + [[ + anno::display_name("Roughness_Contrast"), + anno::ui_order(32) + ]], + float Roughness_Multiplier = 1.0 + [[ + anno::display_name("Roughness_Multiplier"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(NRM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local1 = (float3(Local0.x,Local0.y,Local0.z) * float3(Normal_Intensity.x,Normal_Intensity.y,Normal_Intensity.z)); + + float3 Normal_mdl = Local1; + + float4 Local2 = tex::lookup_float4(Diff,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local3 = tex::lookup_float4(PBR,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local4 = math::lerp(0.0,Emissive_Intensity,Local3.z); + float3 Local5 = (float3(Local2.x,Local2.y,Local2.z) * Local4); + float Local6 = math::lerp(3.0,0.0,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x); + float3 Local7 = (float3(Local2.x,Local2.y,Local2.z) * Local6); + float3 Local8 = (Local5 + Local7); + float3 Local9 = math::lerp(float3(0.0,0.0,0.0),Local8,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float3 Local10 = (Diff_Brightness * float3(Local2.x,Local2.y,Local2.z)); + float3 Local11 = math::lerp(float3(0.5,0.5,0.5),Local10,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float Local12 = (0.0 - Roughness_Contrast); + float Local13 = (Roughness_Contrast + 1.0); + float Local14 = math::lerp(Local12,Local13,Local3.y); + float Local15 = math::min(math::max(Local14,0.0),1.0); + float Local16 = (Local15 * Roughness_Multiplier); + + float3 EmissiveColor_mdl = Local9; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local11; + float Metallic_mdl = Local3.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local16; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_SPDiaper7/OmniUe4Base.mdl b/Goods/Props/Household/SM_SPDiaper7/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_SPDiaper7/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_SPDiaper7/OmniUe4Function.mdl b/Goods/Props/Household/SM_SPDiaper7/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_SPDiaper7/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_SPDiaper7/SM_SPDiaper7.usd b/Goods/Props/Household/SM_SPDiaper7/SM_SPDiaper7.usd new file mode 100644 index 0000000000000000000000000000000000000000..25e441bc55af8ba9daab9e0d64116772da27c7c6 Binary files /dev/null and b/Goods/Props/Household/SM_SPDiaper7/SM_SPDiaper7.usd differ diff --git a/Goods/Props/Household/SM_SPDiaper9/MI_SanitaryProducts_Inst.mdl b/Goods/Props/Household/SM_SPDiaper9/MI_SanitaryProducts_Inst.mdl new file mode 100644 index 0000000000000000000000000000000000000000..883adfe0c7c9cda0ebb1103f3e8fb8455f98510e --- /dev/null +++ b/Goods/Props/Household/SM_SPDiaper9/MI_SanitaryProducts_Inst.mdl @@ -0,0 +1,113 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_SanitaryProducts_Inst( + uniform texture_2d NRM = texture_2d("./MI_SanitaryProducts_Inst/T_SanitaryProducts_NRM.png",::tex::gamma_linear) + [[ + anno::display_name("NRM"), + anno::ui_order(32), + sampler_normal() + ]], + float4 Normal_Intensity = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Normal_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d Diff = texture_2d("./MI_SanitaryProducts_Inst/T_SanitaryProducts_Diff.png",::tex::gamma_srgb) + [[ + anno::display_name("Diff"), + anno::ui_order(32), + sampler_color() + ]], + float Emissive_Intensity = 0.0 + [[ + anno::display_name("Emissive_Intensity"), + anno::ui_order(32) + ]], + uniform texture_2d PBR = texture_2d("./MI_SanitaryProducts_Inst/T_SanitaryProducts_PBR.png",::tex::gamma_linear) + [[ + anno::display_name("PBR"), + anno::ui_order(32), + sampler_color() + ]], + float Diff_Brightness = 1.0 + [[ + anno::display_name("Diff_Brightness"), + anno::ui_order(32) + ]], + float Roughness_Contrast = 0.0 + [[ + anno::display_name("Roughness_Contrast"), + anno::ui_order(32) + ]], + float Roughness_Multiplier = 1.0 + [[ + anno::display_name("Roughness_Multiplier"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(NRM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + float3 Local1 = (float3(Local0.x,Local0.y,Local0.z) * float3(Normal_Intensity.x,Normal_Intensity.y,Normal_Intensity.z)); + + float3 Normal_mdl = Local1; + + float4 Local2 = tex::lookup_float4(Diff,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local3 = tex::lookup_float4(PBR,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local4 = math::lerp(0.0,Emissive_Intensity,Local3.z); + float3 Local5 = (float3(Local2.x,Local2.y,Local2.z) * Local4); + float Local6 = math::lerp(3.0,0.0,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x); + float3 Local7 = (float3(Local2.x,Local2.y,Local2.z) * Local6); + float3 Local8 = (Local5 + Local7); + float3 Local9 = math::lerp(float3(0.0,0.0,0.0),Local8,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float3 Local10 = (Diff_Brightness * float3(Local2.x,Local2.y,Local2.z)); + float3 Local11 = math::lerp(float3(0.5,0.5,0.5),Local10,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z); + float Local12 = (0.0 - Roughness_Contrast); + float Local13 = (Roughness_Contrast + 1.0); + float Local14 = math::lerp(Local12,Local13,Local3.y); + float Local15 = math::min(math::max(Local14,0.0),1.0); + float Local16 = (Local15 * Roughness_Multiplier); + + float3 EmissiveColor_mdl = Local9; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local11; + float Metallic_mdl = Local3.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local16; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_SPDiaper9/OmniUe4Base.mdl b/Goods/Props/Household/SM_SPDiaper9/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_SPDiaper9/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_SPDiaper9/OmniUe4Function.mdl b/Goods/Props/Household/SM_SPDiaper9/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_SPDiaper9/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_SPDiaper9/SM_SPDiaper9.usd b/Goods/Props/Household/SM_SPDiaper9/SM_SPDiaper9.usd new file mode 100644 index 0000000000000000000000000000000000000000..da51dec40702ac3084d15e8e3015e9490ff4b9f8 Binary files /dev/null and b/Goods/Props/Household/SM_SPDiaper9/SM_SPDiaper9.usd differ diff --git a/Goods/Props/Household/SM_Tissuebox_01/MI_Tissues_01.mdl b/Goods/Props/Household/SM_Tissuebox_01/MI_Tissues_01.mdl new file mode 100644 index 0000000000000000000000000000000000000000..9da898455c2bf528f167053d0f534e00f954b868 --- /dev/null +++ b/Goods/Props/Household/SM_Tissuebox_01/MI_Tissues_01.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Tissues_01( + uniform texture_2d Normal = texture_2d("./MI_Tissues_01/T_Tissuebox_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Tissues_01/T_Tissues_01.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Tissues_01/T_Tissuebox_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Tissuebox_01/MI_Tissues_02.mdl b/Goods/Props/Household/SM_Tissuebox_01/MI_Tissues_02.mdl new file mode 100644 index 0000000000000000000000000000000000000000..16fae13fac20b18522a1a8db4d91f70793a0e9d3 --- /dev/null +++ b/Goods/Props/Household/SM_Tissuebox_01/MI_Tissues_02.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Tissues_02( + uniform texture_2d Normal = texture_2d("./MI_Tissues_02/T_Tissuebox_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Tissues_02/T_Tissues_02.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Tissues_02/T_Tissuebox_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Tissuebox_01/MI_Tissues_03.mdl b/Goods/Props/Household/SM_Tissuebox_01/MI_Tissues_03.mdl new file mode 100644 index 0000000000000000000000000000000000000000..acc61474efc46d911a3068637cab4edb67bd45fb --- /dev/null +++ b/Goods/Props/Household/SM_Tissuebox_01/MI_Tissues_03.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Tissues_03( + uniform texture_2d Normal = texture_2d("./MI_Tissues_03/T_Tissuebox_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Tissues_03/T_Tissues_03.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Tissues_03/T_Tissuebox_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Tissuebox_01/MI_Tissues_04.mdl b/Goods/Props/Household/SM_Tissuebox_01/MI_Tissues_04.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a9bf1b57e5d81d9088b74190ca54687d06ba8ea7 --- /dev/null +++ b/Goods/Props/Household/SM_Tissuebox_01/MI_Tissues_04.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Tissues_04( + uniform texture_2d Normal = texture_2d("./MI_Tissues_04/T_Tissuebox_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Tissues_04/T_Tissues_04.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Tissues_04/T_Tissuebox_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Tissuebox_01/MI_Tissues_05.mdl b/Goods/Props/Household/SM_Tissuebox_01/MI_Tissues_05.mdl new file mode 100644 index 0000000000000000000000000000000000000000..43d6e28c3faed442bd579732623efd98fd0205cc --- /dev/null +++ b/Goods/Props/Household/SM_Tissuebox_01/MI_Tissues_05.mdl @@ -0,0 +1,108 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material MI_Tissues_05( + uniform texture_2d Normal = texture_2d("./MI_Tissues_05/T_Tissuebox_01_Normal.png",::tex::gamma_linear) + [[ + anno::display_name("Normal"), + anno::ui_order(32), + sampler_normal() + ]], + float Brightness = 1.0 + [[ + anno::display_name("Brightness"), + anno::ui_order(32) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Hue = 0.0 + [[ + anno::display_name("Hue"), + anno::ui_order(32) + ]], + uniform texture_2d Albedo = texture_2d("./MI_Tissues_05/T_Tissues_05.png",::tex::gamma_srgb) + [[ + anno::display_name("Albedo"), + anno::ui_order(32), + sampler_color() + ]], + float Desaturate = 0.0 + [[ + anno::display_name("Desaturate"), + anno::ui_order(32) + ]], + uniform texture_2d AORM = texture_2d("./MI_Tissues_05/T_Tissuebox_01_Masks.png",::tex::gamma_linear) + [[ + anno::display_name("AORM"), + anno::ui_order(32), + sampler_color() + ]], + float Roughness = 1.0 + [[ + anno::display_name("Roughness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(Normal,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float Local1 = (Hue * 6.283185); + float3 Local2 = math::normalize(float3(1.0,1.0,1.0)); + float4 Local3 = tex::lookup_float4(Albedo,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local4 = ::rotate_about_axis(float4(Local2.x,Local2.y,Local2.z,Local1),float3(0.0,0.0,0.0),float3(Local3.x,Local3.y,Local3.z)); + float3 Local5 = (Local4 + float3(Local3.x,Local3.y,Local3.z)); + float Local6 = math::dot(Local5, float3(0.3,0.59,0.11)); + float3 Local7 = math::lerp(Local5,float3(Local6,Local6,Local6),Desaturate); + float3 Local8 = (float3(Color.x,Color.y,Color.z) * Local7); + float3 Local9 = (Brightness * Local8); + float4 Local10 = tex::lookup_float4(AORM,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float Local11 = (Roughness * Local10.y); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = Local10.z; + float Specular_mdl = 0.2; + float Roughness_mdl = Local11; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Tissuebox_01/OmniUe4Base.mdl b/Goods/Props/Household/SM_Tissuebox_01/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_Tissuebox_01/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_Tissuebox_01/OmniUe4Function.mdl b/Goods/Props/Household/SM_Tissuebox_01/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_Tissuebox_01/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_Tissuebox_01/SM_Tissuebox_01.usd b/Goods/Props/Household/SM_Tissuebox_01/SM_Tissuebox_01.usd new file mode 100644 index 0000000000000000000000000000000000000000..f84fc61c6c495a1b76f50e8e420492fdcf850740 Binary files /dev/null and b/Goods/Props/Household/SM_Tissuebox_01/SM_Tissuebox_01.usd differ diff --git a/Goods/Props/Household/SM_Toothbrush_Package/M_Group_1.mdl b/Goods/Props/Household/SM_Toothbrush_Package/M_Group_1.mdl new file mode 100644 index 0000000000000000000000000000000000000000..6d4ce3e2d69ad866146397f73e0cae45c8d2cea8 --- /dev/null +++ b/Goods/Props/Household/SM_Toothbrush_Package/M_Group_1.mdl @@ -0,0 +1,59 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Group_1( + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) +[[ + dither_masked_off() +]] + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_Group_1/T_Group_1_N.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_Group_1/T_Group_1_D.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local2 = tex::lookup_float4(texture_2d("./M_Group_1/T_Group_1_M.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = (Local1.w - 0.3333) < 0.0f ? 0.0f : 1.0f; + float3 BaseColor_mdl = float3(Local1.x,Local1.y,Local1.z); + float Metallic_mdl = Local2.x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local2.y; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Household/SM_Toothbrush_Package/OmniUe4Base.mdl b/Goods/Props/Household/SM_Toothbrush_Package/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Household/SM_Toothbrush_Package/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Household/SM_Toothbrush_Package/OmniUe4Function.mdl b/Goods/Props/Household/SM_Toothbrush_Package/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Household/SM_Toothbrush_Package/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Household/SM_Toothbrush_Package/SM_Toothbrush_Package.usd b/Goods/Props/Household/SM_Toothbrush_Package/SM_Toothbrush_Package.usd new file mode 100644 index 0000000000000000000000000000000000000000..20ddf592f3ee8087ba28b96a42ffbc0cf0a9b52b Binary files /dev/null and b/Goods/Props/Household/SM_Toothbrush_Package/SM_Toothbrush_Package.usd differ diff --git a/Goods/Props/Lamps/SM_Lamp/MI_SimpleLampEmission.mdl b/Goods/Props/Lamps/SM_Lamp/MI_SimpleLampEmission.mdl new file mode 100644 index 0000000000000000000000000000000000000000..8e23a9f532183e444501e531d987ccba79eb5ec5 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp/MI_SimpleLampEmission.mdl @@ -0,0 +1,97 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +float3 CustomExpression0(float3 Lumen,float3 Default) +{ +return Lumen; + +} + + +export material MI_SimpleLampEmission( + float Emissive = 1.0 + [[ + anno::display_name("Emissive"), + anno::ui_order(32), + anno::soft_range(0.0, 100.0) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Lumen = 1.0 + [[ + anno::display_name("Lumen"), + anno::ui_order(32) + ]], + float Exp = 5.0 + [[ + anno::display_name("Exp"), + anno::ui_order(32) + ]], + uniform texture_2d MainEmission = texture_2d("./MI_SimpleLampEmission/T_Blank.png",::tex::gamma_srgb) + [[ + anno::display_name("MainEmission"), + anno::ui_order(32), + sampler_color() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + + float3 Normal_mdl = float3(0.0,0.0,1.0); + + float3 Local0 = (Emissive * float3(Color.x,Color.y,Color.z)); + float3 Local1 = (1.0 * Local0); + float3 Local2 = (Local1 * Lumen); + float Local3 = ::fresnel(5.0, 0.04, ::pixel_normal_world_space(true)); + float Local4 = (1.0 - Local3); + float Local5 = math::pow(math::max(Local4,float(0.000001)),Exp); + float3 Local6 = (Local5 * Local1); + float3 Local7 = CustomExpression0(Local2,Local6); + float4 Local8 = tex::lookup_float4(MainEmission,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local9 = (float3(Color.x,Color.y,Color.z) * float3(Local8.x,Local8.y,Local8.z)); + + float3 EmissiveColor_mdl = Local7; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = 0.0; + float Specular_mdl = 0.5; + float Roughness_mdl = 1.0; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Lamps/SM_Lamp/M_MarketAssets.mdl b/Goods/Props/Lamps/SM_Lamp/M_MarketAssets.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a18f6731b490be7904c3853ee425598b671df9b4 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp/M_MarketAssets.mdl @@ -0,0 +1,77 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_MarketAssets( + float Param = 2.0 + [[ + anno::display_name("Param"), + anno::ui_order(32) + ]], + float4 EmissionColor = float4(0.2,0.2,0.2,1.0) + [[ + anno::display_name("EmissionColor"), + anno::ui_order(32) + ]], + float4 DiffuseColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("DiffuseColor"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_MarketAssets/T_MarketAssets_Normal.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_MarketAssets/T_MarketAssets_Emissive.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local2 = (float3(Local1.x,Local1.y,Local1.z) * Param); + float3 Local3 = (Local2 * float3(EmissionColor.x,EmissionColor.y,EmissionColor.z)); + float4 Local4 = tex::lookup_float4(texture_2d("./M_MarketAssets/T_MarketAssets_BaseColor.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local5 = (float3(Local4.x,Local4.y,Local4.z) * float3(DiffuseColor.x,DiffuseColor.y,DiffuseColor.z)); + float3 Local6 = math::min(math::max(Local5,float3(0.01,0.01,0.01)),float3(0.99,0.99,0.99)); + float4 Local7 = tex::lookup_float4(texture_2d("./M_MarketAssets/T_MarketAssets_Metallic.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local8 = tex::lookup_float4(texture_2d("./M_MarketAssets/T_MarketAssets_Roughness.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + + float3 EmissiveColor_mdl = Local3; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local6; + float Metallic_mdl = float3(Local7.x,Local7.y,Local7.z).x; + float Specular_mdl = 0.5; + float Roughness_mdl = float3(Local8.x,Local8.y,Local8.z).x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Lamps/SM_Lamp/OmniUe4Base.mdl b/Goods/Props/Lamps/SM_Lamp/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Lamps/SM_Lamp/OmniUe4Function.mdl b/Goods/Props/Lamps/SM_Lamp/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Lamps/SM_Lamp1/M_EengineeringCommunications_1.mdl b/Goods/Props/Lamps/SM_Lamp1/M_EengineeringCommunications_1.mdl new file mode 100644 index 0000000000000000000000000000000000000000..45e67af6e661ce419efeb7f18187d91472818f41 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp1/M_EengineeringCommunications_1.mdl @@ -0,0 +1,83 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_EengineeringCommunications_1( + float4 Color = float4(1.0,0.912775,0.758253,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Emission = 2.0 + [[ + anno::display_name("Emission"), + anno::ui_order(32) + ]], + float4 DiffuseColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("DiffuseColor"), + anno::ui_order(32) + ]], + float Rougness = 1.0 + [[ + anno::display_name("Rougness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Normal.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Emissive.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local2 = (float3(Local1.x,Local1.y,Local1.z) * Emission); + float3 Local3 = (float3(Color.x,Color.y,Color.z) * Local2); + float3 Local4 = (Local3 * float3(float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).y,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z)); + float4 Local5 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_BaseColor.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local6 = (float3(Local5.x,Local5.y,Local5.z) * float3(DiffuseColor.x,DiffuseColor.y,DiffuseColor.z)); + float4 Local7 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Metallic.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local8 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Roughness.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local9 = (float3(Local8.x,Local8.y,Local8.z) * Rougness); + + float3 EmissiveColor_mdl = Local4; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local6; + float Metallic_mdl = float3(Local7.x,Local7.y,Local7.z).x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local9.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Lamps/SM_Lamp1/OmniUe4Base.mdl b/Goods/Props/Lamps/SM_Lamp1/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp1/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Lamps/SM_Lamp1/OmniUe4Function.mdl b/Goods/Props/Lamps/SM_Lamp1/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp1/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Lamps/SM_Lamp2/M_EengineeringCommunications_1.mdl b/Goods/Props/Lamps/SM_Lamp2/M_EengineeringCommunications_1.mdl new file mode 100644 index 0000000000000000000000000000000000000000..45e67af6e661ce419efeb7f18187d91472818f41 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp2/M_EengineeringCommunications_1.mdl @@ -0,0 +1,83 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_EengineeringCommunications_1( + float4 Color = float4(1.0,0.912775,0.758253,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Emission = 2.0 + [[ + anno::display_name("Emission"), + anno::ui_order(32) + ]], + float4 DiffuseColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("DiffuseColor"), + anno::ui_order(32) + ]], + float Rougness = 1.0 + [[ + anno::display_name("Rougness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Normal.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Emissive.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local2 = (float3(Local1.x,Local1.y,Local1.z) * Emission); + float3 Local3 = (float3(Color.x,Color.y,Color.z) * Local2); + float3 Local4 = (Local3 * float3(float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).y,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z)); + float4 Local5 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_BaseColor.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local6 = (float3(Local5.x,Local5.y,Local5.z) * float3(DiffuseColor.x,DiffuseColor.y,DiffuseColor.z)); + float4 Local7 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Metallic.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local8 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Roughness.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local9 = (float3(Local8.x,Local8.y,Local8.z) * Rougness); + + float3 EmissiveColor_mdl = Local4; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local6; + float Metallic_mdl = float3(Local7.x,Local7.y,Local7.z).x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local9.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Lamps/SM_Lamp2/OmniUe4Base.mdl b/Goods/Props/Lamps/SM_Lamp2/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp2/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Lamps/SM_Lamp2/OmniUe4Function.mdl b/Goods/Props/Lamps/SM_Lamp2/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp2/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Lamps/SM_Lamp2/SM_Lamp2.usd b/Goods/Props/Lamps/SM_Lamp2/SM_Lamp2.usd new file mode 100644 index 0000000000000000000000000000000000000000..687e4fa0e4b7faa82d9dc6f07271230bbc10a141 Binary files /dev/null and b/Goods/Props/Lamps/SM_Lamp2/SM_Lamp2.usd differ diff --git a/Goods/Props/Lamps/SM_Lamp3/M_EengineeringCommunications_1.mdl b/Goods/Props/Lamps/SM_Lamp3/M_EengineeringCommunications_1.mdl new file mode 100644 index 0000000000000000000000000000000000000000..45e67af6e661ce419efeb7f18187d91472818f41 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp3/M_EengineeringCommunications_1.mdl @@ -0,0 +1,83 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_EengineeringCommunications_1( + float4 Color = float4(1.0,0.912775,0.758253,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Emission = 2.0 + [[ + anno::display_name("Emission"), + anno::ui_order(32) + ]], + float4 DiffuseColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("DiffuseColor"), + anno::ui_order(32) + ]], + float Rougness = 1.0 + [[ + anno::display_name("Rougness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Normal.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Emissive.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local2 = (float3(Local1.x,Local1.y,Local1.z) * Emission); + float3 Local3 = (float3(Color.x,Color.y,Color.z) * Local2); + float3 Local4 = (Local3 * float3(float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).y,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z)); + float4 Local5 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_BaseColor.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local6 = (float3(Local5.x,Local5.y,Local5.z) * float3(DiffuseColor.x,DiffuseColor.y,DiffuseColor.z)); + float4 Local7 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Metallic.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local8 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Roughness.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local9 = (float3(Local8.x,Local8.y,Local8.z) * Rougness); + + float3 EmissiveColor_mdl = Local4; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local6; + float Metallic_mdl = float3(Local7.x,Local7.y,Local7.z).x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local9.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Lamps/SM_Lamp3/OmniUe4Base.mdl b/Goods/Props/Lamps/SM_Lamp3/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp3/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Lamps/SM_Lamp3/OmniUe4Function.mdl b/Goods/Props/Lamps/SM_Lamp3/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp3/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Lamps/SM_Lamp3/SM_Lamp3.usd b/Goods/Props/Lamps/SM_Lamp3/SM_Lamp3.usd new file mode 100644 index 0000000000000000000000000000000000000000..c35096e6e4b8a286e47d32cd56110149b75f9645 Binary files /dev/null and b/Goods/Props/Lamps/SM_Lamp3/SM_Lamp3.usd differ diff --git a/Goods/Props/Lamps/SM_Lamp4/M_EengineeringCommunications_1.mdl b/Goods/Props/Lamps/SM_Lamp4/M_EengineeringCommunications_1.mdl new file mode 100644 index 0000000000000000000000000000000000000000..45e67af6e661ce419efeb7f18187d91472818f41 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp4/M_EengineeringCommunications_1.mdl @@ -0,0 +1,83 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_EengineeringCommunications_1( + float4 Color = float4(1.0,0.912775,0.758253,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Emission = 2.0 + [[ + anno::display_name("Emission"), + anno::ui_order(32) + ]], + float4 DiffuseColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("DiffuseColor"), + anno::ui_order(32) + ]], + float Rougness = 1.0 + [[ + anno::display_name("Rougness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Normal.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Emissive.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local2 = (float3(Local1.x,Local1.y,Local1.z) * Emission); + float3 Local3 = (float3(Color.x,Color.y,Color.z) * Local2); + float3 Local4 = (Local3 * float3(float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).y,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z)); + float4 Local5 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_BaseColor.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local6 = (float3(Local5.x,Local5.y,Local5.z) * float3(DiffuseColor.x,DiffuseColor.y,DiffuseColor.z)); + float4 Local7 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Metallic.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local8 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Roughness.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local9 = (float3(Local8.x,Local8.y,Local8.z) * Rougness); + + float3 EmissiveColor_mdl = Local4; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local6; + float Metallic_mdl = float3(Local7.x,Local7.y,Local7.z).x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local9.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Lamps/SM_Lamp4/OmniUe4Base.mdl b/Goods/Props/Lamps/SM_Lamp4/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp4/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Lamps/SM_Lamp4/OmniUe4Function.mdl b/Goods/Props/Lamps/SM_Lamp4/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp4/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Lamps/SM_Lamp4/SM_Lamp4.usd b/Goods/Props/Lamps/SM_Lamp4/SM_Lamp4.usd new file mode 100644 index 0000000000000000000000000000000000000000..c67246e34d72a0feb379b7e06c6d62ea53a0e133 Binary files /dev/null and b/Goods/Props/Lamps/SM_Lamp4/SM_Lamp4.usd differ diff --git a/Goods/Props/Lamps/SM_Lamp5/M_EengineeringCommunications_1.mdl b/Goods/Props/Lamps/SM_Lamp5/M_EengineeringCommunications_1.mdl new file mode 100644 index 0000000000000000000000000000000000000000..45e67af6e661ce419efeb7f18187d91472818f41 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp5/M_EengineeringCommunications_1.mdl @@ -0,0 +1,83 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_EengineeringCommunications_1( + float4 Color = float4(1.0,0.912775,0.758253,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Emission = 2.0 + [[ + anno::display_name("Emission"), + anno::ui_order(32) + ]], + float4 DiffuseColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("DiffuseColor"), + anno::ui_order(32) + ]], + float Rougness = 1.0 + [[ + anno::display_name("Rougness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Normal.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Emissive.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local2 = (float3(Local1.x,Local1.y,Local1.z) * Emission); + float3 Local3 = (float3(Color.x,Color.y,Color.z) * Local2); + float3 Local4 = (Local3 * float3(float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).y,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z)); + float4 Local5 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_BaseColor.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local6 = (float3(Local5.x,Local5.y,Local5.z) * float3(DiffuseColor.x,DiffuseColor.y,DiffuseColor.z)); + float4 Local7 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Metallic.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local8 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Roughness.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local9 = (float3(Local8.x,Local8.y,Local8.z) * Rougness); + + float3 EmissiveColor_mdl = Local4; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local6; + float Metallic_mdl = float3(Local7.x,Local7.y,Local7.z).x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local9.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Lamps/SM_Lamp5/OmniUe4Base.mdl b/Goods/Props/Lamps/SM_Lamp5/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp5/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Lamps/SM_Lamp5/OmniUe4Function.mdl b/Goods/Props/Lamps/SM_Lamp5/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp5/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Lamps/SM_Lamp5/SM_Lamp5.usd b/Goods/Props/Lamps/SM_Lamp5/SM_Lamp5.usd new file mode 100644 index 0000000000000000000000000000000000000000..4d88106563f4b7d10a5e7ff2e44769a214651b1d Binary files /dev/null and b/Goods/Props/Lamps/SM_Lamp5/SM_Lamp5.usd differ diff --git a/Goods/Props/Lamps/SM_Lamp6/M_EengineeringCommunications_1.mdl b/Goods/Props/Lamps/SM_Lamp6/M_EengineeringCommunications_1.mdl new file mode 100644 index 0000000000000000000000000000000000000000..45e67af6e661ce419efeb7f18187d91472818f41 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp6/M_EengineeringCommunications_1.mdl @@ -0,0 +1,83 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_EengineeringCommunications_1( + float4 Color = float4(1.0,0.912775,0.758253,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Emission = 2.0 + [[ + anno::display_name("Emission"), + anno::ui_order(32) + ]], + float4 DiffuseColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("DiffuseColor"), + anno::ui_order(32) + ]], + float Rougness = 1.0 + [[ + anno::display_name("Rougness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Normal.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Emissive.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local2 = (float3(Local1.x,Local1.y,Local1.z) * Emission); + float3 Local3 = (float3(Color.x,Color.y,Color.z) * Local2); + float3 Local4 = (Local3 * float3(float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).y,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z)); + float4 Local5 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_BaseColor.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local6 = (float3(Local5.x,Local5.y,Local5.z) * float3(DiffuseColor.x,DiffuseColor.y,DiffuseColor.z)); + float4 Local7 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Metallic.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local8 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Roughness.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local9 = (float3(Local8.x,Local8.y,Local8.z) * Rougness); + + float3 EmissiveColor_mdl = Local4; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local6; + float Metallic_mdl = float3(Local7.x,Local7.y,Local7.z).x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local9.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Lamps/SM_Lamp6/M_Wire.mdl b/Goods/Props/Lamps/SM_Lamp6/M_Wire.mdl new file mode 100644 index 0000000000000000000000000000000000000000..08eda2b848febb7cf75b81c94c212d420ed63255 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp6/M_Wire.mdl @@ -0,0 +1,48 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Wire( +) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + + + float3 Normal_mdl = float3(0.0,0.0,1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = float3(0.1,0.1,0.1); + float Metallic_mdl = 0.0; + float Specular_mdl = 0.5; + float Roughness_mdl = 0.7; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Lamps/SM_Lamp6/OmniUe4Base.mdl b/Goods/Props/Lamps/SM_Lamp6/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp6/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Lamps/SM_Lamp6/OmniUe4Function.mdl b/Goods/Props/Lamps/SM_Lamp6/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp6/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Lamps/SM_Lamp6/SM_Lamp6.usd b/Goods/Props/Lamps/SM_Lamp6/SM_Lamp6.usd new file mode 100644 index 0000000000000000000000000000000000000000..6177bff5156f34f57ed72f29c41aae03642e1226 Binary files /dev/null and b/Goods/Props/Lamps/SM_Lamp6/SM_Lamp6.usd differ diff --git a/Goods/Props/Lamps/SM_Lamp7/M_EengineeringCommunications_1.mdl b/Goods/Props/Lamps/SM_Lamp7/M_EengineeringCommunications_1.mdl new file mode 100644 index 0000000000000000000000000000000000000000..45e67af6e661ce419efeb7f18187d91472818f41 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp7/M_EengineeringCommunications_1.mdl @@ -0,0 +1,83 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_EengineeringCommunications_1( + float4 Color = float4(1.0,0.912775,0.758253,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Emission = 2.0 + [[ + anno::display_name("Emission"), + anno::ui_order(32) + ]], + float4 DiffuseColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("DiffuseColor"), + anno::ui_order(32) + ]], + float Rougness = 1.0 + [[ + anno::display_name("Rougness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Normal.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Emissive.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local2 = (float3(Local1.x,Local1.y,Local1.z) * Emission); + float3 Local3 = (float3(Color.x,Color.y,Color.z) * Local2); + float3 Local4 = (Local3 * float3(float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).y,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z)); + float4 Local5 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_BaseColor.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local6 = (float3(Local5.x,Local5.y,Local5.z) * float3(DiffuseColor.x,DiffuseColor.y,DiffuseColor.z)); + float4 Local7 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Metallic.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local8 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Roughness.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local9 = (float3(Local8.x,Local8.y,Local8.z) * Rougness); + + float3 EmissiveColor_mdl = Local4; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local6; + float Metallic_mdl = float3(Local7.x,Local7.y,Local7.z).x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local9.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Lamps/SM_Lamp7/OmniUe4Base.mdl b/Goods/Props/Lamps/SM_Lamp7/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp7/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Lamps/SM_Lamp7/OmniUe4Function.mdl b/Goods/Props/Lamps/SM_Lamp7/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Lamps/SM_Lamp7/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +} diff --git a/Goods/Props/Lamps/SM_Lamp7/SM_Lamp7.usd b/Goods/Props/Lamps/SM_Lamp7/SM_Lamp7.usd new file mode 100644 index 0000000000000000000000000000000000000000..242da8d68427a394d71046c5a9cd1b16ea55f080 Binary files /dev/null and b/Goods/Props/Lamps/SM_Lamp7/SM_Lamp7.usd differ diff --git a/Goods/Props/Lamps/SM_PendantLamp/MI_SimpleLampEmission.mdl b/Goods/Props/Lamps/SM_PendantLamp/MI_SimpleLampEmission.mdl new file mode 100644 index 0000000000000000000000000000000000000000..8e23a9f532183e444501e531d987ccba79eb5ec5 --- /dev/null +++ b/Goods/Props/Lamps/SM_PendantLamp/MI_SimpleLampEmission.mdl @@ -0,0 +1,97 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +float3 CustomExpression0(float3 Lumen,float3 Default) +{ +return Lumen; + +} + + +export material MI_SimpleLampEmission( + float Emissive = 1.0 + [[ + anno::display_name("Emissive"), + anno::ui_order(32), + anno::soft_range(0.0, 100.0) + ]], + float4 Color = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Lumen = 1.0 + [[ + anno::display_name("Lumen"), + anno::ui_order(32) + ]], + float Exp = 5.0 + [[ + anno::display_name("Exp"), + anno::ui_order(32) + ]], + uniform texture_2d MainEmission = texture_2d("./MI_SimpleLampEmission/T_Blank.png",::tex::gamma_srgb) + [[ + anno::display_name("MainEmission"), + anno::ui_order(32), + sampler_color() + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + + float3 Normal_mdl = float3(0.0,0.0,1.0); + + float3 Local0 = (Emissive * float3(Color.x,Color.y,Color.z)); + float3 Local1 = (1.0 * Local0); + float3 Local2 = (Local1 * Lumen); + float Local3 = ::fresnel(5.0, 0.04, ::pixel_normal_world_space(true)); + float Local4 = (1.0 - Local3); + float Local5 = math::pow(math::max(Local4,float(0.000001)),Exp); + float3 Local6 = (Local5 * Local1); + float3 Local7 = CustomExpression0(Local2,Local6); + float4 Local8 = tex::lookup_float4(MainEmission,float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local9 = (float3(Color.x,Color.y,Color.z) * float3(Local8.x,Local8.y,Local8.z)); + + float3 EmissiveColor_mdl = Local7; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local9; + float Metallic_mdl = 0.0; + float Specular_mdl = 0.5; + float Roughness_mdl = 1.0; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Lamps/SM_PendantLamp/M_EengineeringCommunications_1.mdl b/Goods/Props/Lamps/SM_PendantLamp/M_EengineeringCommunications_1.mdl new file mode 100644 index 0000000000000000000000000000000000000000..45e67af6e661ce419efeb7f18187d91472818f41 --- /dev/null +++ b/Goods/Props/Lamps/SM_PendantLamp/M_EengineeringCommunications_1.mdl @@ -0,0 +1,83 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_EengineeringCommunications_1( + float4 Color = float4(1.0,0.912775,0.758253,1.0) + [[ + anno::display_name("Color"), + anno::ui_order(32) + ]], + float Emission = 2.0 + [[ + anno::display_name("Emission"), + anno::ui_order(32) + ]], + float4 DiffuseColor = float4(1.0,1.0,1.0,1.0) + [[ + anno::display_name("DiffuseColor"), + anno::ui_order(32) + ]], + float Rougness = 1.0 + [[ + anno::display_name("Rougness"), + anno::ui_order(32) + ]], + int MaxTexCoordIndex = 3 + [[ + anno::hidden() + ]]) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + float2 CustomizedUV0_mdl = float2(state::texture_coordinate(math::min(0,MaxTexCoordIndex)).x,1.0-state::texture_coordinate(math::min(0,MaxTexCoordIndex)).y); + + float4 Local0 = ::unpack_normal_map(tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Normal.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat)); + + float3 Normal_mdl = float3(Local0.x,Local0.y,Local0.z); + + float4 Local1 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Emissive.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local2 = (float3(Local1.x,Local1.y,Local1.z) * Emission); + float3 Local3 = (float3(Color.x,Color.y,Color.z) * Local2); + float3 Local4 = (Local3 * float3(float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).x,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).y,float4(scene::data_lookup_float3("displayColor").x, scene::data_lookup_float3("displayColor").y, scene::data_lookup_float3("displayColor").z, scene::data_lookup_float("displayOpacity")).z)); + float4 Local5 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_BaseColor.png",::tex::gamma_srgb),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local6 = (float3(Local5.x,Local5.y,Local5.z) * float3(DiffuseColor.x,DiffuseColor.y,DiffuseColor.z)); + float4 Local7 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Metallic.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float4 Local8 = tex::lookup_float4(texture_2d("./M_EengineeringCommunications_1/T_Communication_Roughness.png",::tex::gamma_linear),float2(CustomizedUV0_mdl.x,1.0-CustomizedUV0_mdl.y),tex::wrap_repeat,tex::wrap_repeat); + float3 Local9 = (float3(Local8.x,Local8.y,Local8.z) * Rougness); + + float3 EmissiveColor_mdl = Local4; + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = Local6; + float Metallic_mdl = float3(Local7.x,Local7.y,Local7.z).x; + float Specular_mdl = 0.5; + float Roughness_mdl = Local9.x; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Lamps/SM_PendantLamp/M_Wire.mdl b/Goods/Props/Lamps/SM_PendantLamp/M_Wire.mdl new file mode 100644 index 0000000000000000000000000000000000000000..08eda2b848febb7cf75b81c94c212d420ed63255 --- /dev/null +++ b/Goods/Props/Lamps/SM_PendantLamp/M_Wire.mdl @@ -0,0 +1,48 @@ +mdl 1.6; + +import ::math::*; +import ::state::*; +import ::tex::*; +import ::anno::*; +import ::scene::*; +using .::OmniUe4Function import *; +using .::OmniUe4Base import *; + +export annotation sampler_color(); +export annotation sampler_normal(); +export annotation sampler_grayscale(); +export annotation sampler_alpha(); +export annotation sampler_masks(); +export annotation sampler_distancefield(); +export annotation dither_masked_off(); +export annotation world_space_normal(); + +export material M_Wire( +) + = + let { + float3 WorldPositionOffset_mdl = float3(0.0,0.0,0.0); + + + float3 Normal_mdl = float3(0.0,0.0,1.0); + + float3 EmissiveColor_mdl = float3(0.0,0.0,0.0); + float OpacityMask_mdl = 1.0; + float3 BaseColor_mdl = float3(0.1,0.1,0.1); + float Metallic_mdl = 0.0; + float Specular_mdl = 0.5; + float Roughness_mdl = 0.7; + float SurfaceThickness_mdl = 0.01; + float Displacement_mdl = 0.0; + + } in + ::OmniUe4Base( + base_color: BaseColor_mdl, + metallic: Metallic_mdl, + roughness: Roughness_mdl, + specular: Specular_mdl, + normal: Normal_mdl, + opacity: OpacityMask_mdl, + emissive_color: EmissiveColor_mdl, + displacement: WorldPositionOffset_mdl, + two_sided: false); diff --git a/Goods/Props/Lamps/SM_PendantLamp/OmniUe4Base.mdl b/Goods/Props/Lamps/SM_PendantLamp/OmniUe4Base.mdl new file mode 100644 index 0000000000000000000000000000000000000000..a441fbaf28040302c7aaabfbcf14b24a85bdf643 --- /dev/null +++ b/Goods/Props/Lamps/SM_PendantLamp/OmniUe4Base.mdl @@ -0,0 +1,224 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.0 - first version +//* 1.0.1 - merge unlit template +//* 1.0.2 - Fix EDF in the back side: the EDF contained in surface is only used for the front side and not for the back side +//* 1.0.3 - UE4 normal mapping: Geometry normal shouldn't be changed +//* 1.0.4 - using absolute import paths when importing standard modules + +mdl 1.3; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + +float emissive_multiplier() +[[ + anno::description("the multiplier to convert UE4 emissive to raw data"), + anno::noinline() +]] +{ + return 20.0f * 128.0f; +} + +float3 tangent_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in tangent space"), + anno::noinline() +]] +{ + return math::normalize( + tangent_u * normal.x - /* flip_tangent_v */ + tangent_v * normal.y + + state::normal() * (normal.z)); +} + +float3 world_space_normal( + float3 normal = float3(0.0,0.0,1.0), + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0) +) +[[ + anno::description("Interprets the vector in world space"), + anno::noinline() +]] +{ + return tangent_space_normal( + math::normalize( + normal.x * float3(tangent_u.x, tangent_v.x, state::normal().x) - + normal.y * float3(tangent_u.y, tangent_v.y, state::normal().y) + + normal.z * float3(tangent_u.z, tangent_v.z, state::normal().z)), + tangent_u, + tangent_v + ); +} + +export material OmniUe4Base( + float3 base_color = float3(0.0, 0.0, 0.0), + float metallic = 0.0, + float roughness = 0.5, + float specular = 0.5, + float3 normal = float3(0.0,0.0,1.0), + float clearcoat_weight = 0.0, + float clearcoat_roughness = 0.0, + float3 clearcoat_normal = float3(0.0,0.0,1.0), + uniform bool enable_opacity = true, + float opacity = 1.0, + float3 emissive_color = float3(0.0, 0.0, 0.0), + float3 displacement = float3(0.0), + uniform bool is_tangent_space_normal = true, + uniform bool two_sided = false, + uniform bool is_unlit = false +) +[[ + anno::display_name("Omni UE4 Base"), + anno::description("Omni UE4 Base, supports UE4 default lit and clearcoat shading model"), + anno::version( 1, 0, 0), + anno::author("NVIDIA CORPORATION"), + anno::key_words(string[]("omni", "UE4", "omniverse", "lit", "clearcoat", "generic")) +]] + = let { + color final_base_color = math::saturate(base_color); + float final_metallic = math::saturate(metallic); + float final_roughness = math::saturate(roughness); + float final_specular = math::saturate(specular); + color final_emissive_color = math::max(emissive_color, 0.0f) * emissive_multiplier(); /*factor for converting ue4 emissive to raw value*/ + float final_clearcoat_weight = math::saturate(clearcoat_weight); + float final_clearcoat_roughness = math::saturate(clearcoat_roughness); + float3 final_normal = math::normalize(normal); + float3 final_clearcoat_normal = math::normalize(clearcoat_normal); + + // - compute final roughness by squaring the "roughness" parameter + float alpha = final_roughness * final_roughness; + // reduce the reflectivity at grazing angles to avoid "dark edges" for high roughness due to the layering + float grazing_refl = math::max((1.0 - final_roughness), 0.0); + + float3 the_normal = is_unlit ? state::normal() : + (is_tangent_space_normal ? + tangent_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + )); + + // for the dielectric component we layer the glossy component on top of the diffuse one, + // the glossy layer has no color tint + + bsdf dielectric_component = df::custom_curve_layer( + weight: final_specular, + normal_reflectivity: 0.08, + grazing_reflectivity: grazing_refl, + layer: df::microfacet_ggx_smith_bsdf(roughness_u: alpha), + base: df::diffuse_reflection_bsdf(tint: final_base_color), + normal: the_normal); + + // the metallic component doesn't have a diffuse component, it's only glossy + // base_color is applied to tint it + bsdf metallic_component = df::microfacet_ggx_smith_bsdf(tint: final_base_color, roughness_u: alpha); + + // final BSDF is a linear blend between dielectric and metallic component + bsdf dielectric_metal_mix = + df::normalized_mix( + components: + df::bsdf_component[]( + df::bsdf_component( + component: metallic_component, + weight: final_metallic), + df::bsdf_component( + component: dielectric_component, + weight: 1.0-final_metallic) + ) + ); + + // clearcoat layer + float clearcoat_grazing_refl = math::max((1.0 - final_clearcoat_roughness), 0.0); + float clearcoat_alpha = final_clearcoat_roughness * final_clearcoat_roughness; + + float3 the_clearcoat_normal = is_tangent_space_normal ? tangent_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ) : world_space_normal( + normal: final_clearcoat_normal, + tangent_u: state::texture_tangent_u(0), + tangent_v: state::texture_tangent_v(0) + ); + + + bsdf clearcoat = + df::custom_curve_layer( + base: df::weighted_layer( + layer: dielectric_metal_mix, + weight: 1.0, + normal: final_clearcoat_weight == 0.0 ? state::normal() : the_normal + ), + layer: df::microfacet_ggx_smith_bsdf( + roughness_u: clearcoat_alpha, + tint: color(1.0) + ), + normal_reflectivity: 0.04, + grazing_reflectivity: clearcoat_grazing_refl, + normal: the_clearcoat_normal, + weight: final_clearcoat_weight + ); + bsdf surface = is_unlit ? bsdf() : clearcoat; +} +in material( + thin_walled: two_sided, // Graphene? + surface: material_surface( + scattering: surface, + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + backface: material_surface( + emission: + material_emission ( + emission: df::diffuse_edf (), + intensity: final_emissive_color + ) + ), + geometry: material_geometry( + displacement: displacement, + normal: final_clearcoat_weight == 0.0 ? the_normal : state::normal(), + cutout_opacity: enable_opacity ? opacity : 1.0 + ) +); diff --git a/Goods/Props/Lamps/SM_PendantLamp/OmniUe4Function.mdl b/Goods/Props/Lamps/SM_PendantLamp/OmniUe4Function.mdl new file mode 100644 index 0000000000000000000000000000000000000000..84f4f0da48ff31d03ee611373fe3a4d2e04c9079 --- /dev/null +++ b/Goods/Props/Lamps/SM_PendantLamp/OmniUe4Function.mdl @@ -0,0 +1,1413 @@ +/*************************************************************************************************** + * Copyright 2020 NVIDIA Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of NVIDIA CORPORATION nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + **************************************************************************************************/ + +//* 1.0.1 - using absolute import paths when importing standard modules + +mdl 1.6; + +import ::df::*; +import ::state::*; +import ::math::*; +import ::tex::*; +import ::anno::*; + + +export float3 convert_to_left_hand(float3 vec3, uniform bool up_z = true, uniform bool is_position = true) +[[ + anno::description("convert from RH to LH"), + anno::noinline() +]] +{ + float4x4 ZupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, -1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4x4 YupConversion = float4x4( + 1.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 1.0f, 0.0f, + 0.0f, 1.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f + ); + + float4 vec4 = float4(vec3.x, vec3.y, vec3.z, is_position ? 1.0f : 0.0f); + + vec4 = vec4 * (up_z ? ZupConversion : YupConversion); + + return float3(vec4.x, vec4.y, vec4.z); +} + +export float3 transform_vector_from_tangent_to_world(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from tangent space to world space"), + anno::noinline() +]] +{ + /* flip_tangent_v */ + return convert_to_left_hand( + tangent_u * vector.x - tangent_v * vector.y + state::normal() * vector.z, + up_z, false); +} + +export float3 transform_vector_from_world_to_tangent(float3 vector, + uniform bool up_z = true, + float3 tangent_u = state::texture_tangent_u(0), + float3 tangent_v = state::texture_tangent_v(0)) +[[ + anno::description("Transform vector from world space to tangent space"), + anno::noinline() +]] +{ + float3 vecRH = convert_to_left_hand(vector, up_z, false); + /* flip_tangent_v */ + return vecRH.x * float3(tangent_u.x, -tangent_v.x, state::normal().x) + + vecRH.y * float3(tangent_u.y, -tangent_v.y, state::normal().y) + + vecRH.z * float3(tangent_u.z, -tangent_v.z, state::normal().z); +} + +export float4 unpack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Unpack a normal stored in a normal map"), + anno::noinline() +]] +{ + float2 normal_xy = float2(texture_sample.x, texture_sample.y); + + normal_xy = normal_xy * float2(2.0,2.0) - float2(1.0,1.0); + float normal_z = math::sqrt( math::saturate( 1.0 - math::dot( normal_xy, normal_xy ) ) ); + return float4( normal_xy.x, normal_xy.y, normal_z, 1.0 ); +} + +// for get color value from normal. +export float4 pack_normal_map( + float4 texture_sample = float4(0.0, 0.0, 1.0, 1.0) + ) +[[ + anno::description("Pack to color from a normal") +]] +{ + float2 return_xy = float2(texture_sample.x, texture_sample.y); + + return_xy = (return_xy + float2(1.0,1.0)) / float2(2.0,2.0); + + return float4( return_xy.x, return_xy.y, 0.0, 1.0 ); +} + +export float4 greyscale_texture_lookup( + float4 texture_sample = float4(0.0, 0.0, 0.0, 1.0) + ) +[[ + anno::description("Sampling a greyscale texture"), + anno::noinline() +]] +{ + return float4(texture_sample.x, texture_sample.x, texture_sample.x, texture_sample.x); +} + +export float3 pixel_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Pixel normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 vertex_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Vertex normal in world space"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); +} + +export float3 landscape_normal_world_space(uniform bool up_z = true) +[[ + anno::description("Landscape normal in world space") +]] +{ + float3 normalFromNormalmap = math::floor((::vertex_normal_world_space(up_z) * 0.5 + 0.5) * 255.0) / 255.0 * 2.0 - 1.0; + + float2 normalXY = float2(normalFromNormalmap.x, normalFromNormalmap.y); + return float3(normalXY.x, normalXY.y, math::sqrt(math::saturate(1.0 - math::dot(normalXY, normalXY)))); +} + +// Different implementation specific between mdl and hlsl for smoothstep +export float smoothstep(float a, float b, float l) +{ + if (a < b) + { + return math::smoothstep(a, b, l); + } + else if (a > b) + { + return 1.0 - math::smoothstep(b, a, l); + } + else + { + return l <= a ? 0.0 : 1.0; + } +} + +export float2 smoothstep(float2 a, float2 b, float2 l) +{ + return float2(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y)); +} + +export float3 smoothstep(float3 a, float3 b, float3 l) +{ + return float3(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z)); +} + +export float4 smoothstep(float4 a, float4 b, float4 l) +{ + return float4(smoothstep(a.x, b.x, l.x), smoothstep(a.y, b.y, l.y), smoothstep(a.z, b.z, l.z), smoothstep(a.w, b.w, l.w)); +} + +export float2 smoothstep(float2 a, float2 b, float l) +{ + return float2(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l)); +} + +export float3 smoothstep(float3 a, float3 b, float l) +{ + return float3(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l)); +} + +export float4 smoothstep(float4 a, float4 b, float l) +{ + return float4(smoothstep(a.x, b.x, l), smoothstep(a.y, b.y, l), smoothstep(a.z, b.z, l), smoothstep(a.w, b.w, l)); +} + +export float2 smoothstep(float a, float b, float2 l) +{ + return float2(smoothstep(a, b, l.x), smoothstep(a, b, l.y)); +} + +export float3 smoothstep(float a, float b, float3 l) +{ + return float3(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z)); +} + +export float4 smoothstep(float a, float b, float4 l) +{ + return float4(smoothstep(a, b, l.x), smoothstep(a, b, l.y), smoothstep(a, b, l.z), smoothstep(a, b, l.w)); +} + +//------------------ Random from UE4 ----------------------- +float length2(float3 v) +{ + return math::dot(v, v); +} + +float3 GetPerlinNoiseGradientTextureAt(uniform texture_2d PerlinNoiseGradientTexture, float3 v) +{ + const float2 ZShear = float2(17.0f, 89.0f); + + float2 OffsetA = v.z * ZShear; + float2 TexA = (float2(v.x, v.y) + OffsetA + 0.5f) / 128.0f; + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA.x,1.0-TexA.y),tex::wrap_repeat,tex::wrap_repeat); + return float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z) * 2.0 - 1.0; +} + +float3 SkewSimplex(float3 In) +{ + return In + math::dot(In, float3(1.0 / 3.0f) ); +} +float3 UnSkewSimplex(float3 In) +{ + return In - math::dot(In, float3(1.0 / 6.0f) ); +} + +// 3D random number generator inspired by PCGs (permuted congruential generator) +// Using a **simple** Feistel cipher in place of the usual xor shift permutation step +// @param v = 3D integer coordinate +// @return three elements w/ 16 random bits each (0-0xffff). +// ~8 ALU operations for result.x (7 mad, 1 >>) +// ~10 ALU operations for result.xy (8 mad, 2 >>) +// ~12 ALU operations for result.xyz (9 mad, 3 >>) + +//TODO: uint3 +int3 Rand3DPCG16(int3 p) +{ + // taking a signed int then reinterpreting as unsigned gives good behavior for negatives + //TODO: uint3 + int3 v = int3(p); + + // Linear congruential step. These LCG constants are from Numerical Recipies + // For additional #'s, PCG would do multiple LCG steps and scramble each on output + // So v here is the RNG state + v = v * 1664525 + 1013904223; + + // PCG uses xorshift for the final shuffle, but it is expensive (and cheap + // versions of xorshift have visible artifacts). Instead, use simple MAD Feistel steps + // + // Feistel ciphers divide the state into separate parts (usually by bits) + // then apply a series of permutation steps one part at a time. The permutations + // use a reversible operation (usually ^) to part being updated with the result of + // a permutation function on the other parts and the key. + // + // In this case, I'm using v.x, v.y and v.z as the parts, using + instead of ^ for + // the combination function, and just multiplying the other two parts (no key) for + // the permutation function. + // + // That gives a simple mad per round. + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + v.x += v.y*v.z; + v.y += v.z*v.x; + v.z += v.x*v.y; + + // only top 16 bits are well shuffled + return v >> 16; +} + +// Wraps noise for tiling texture creation +// @param v = unwrapped texture parameter +// @param bTiling = true to tile, false to not tile +// @param RepeatSize = number of units before repeating +// @return either original or wrapped coord +float3 NoiseTileWrap(float3 v, bool bTiling, float RepeatSize) +{ + return bTiling ? (math::frac(v / RepeatSize) * RepeatSize) : v; +} + +// Evaluate polynomial to get smooth transitions for Perlin noise +// only needed by Perlin functions in this file +// scalar(per component): 2 add, 5 mul +float4 PerlinRamp(float4 t) +{ + return t * t * t * (t * (t * 6 - 15) + 10); +} + +// Blum-Blum-Shub-inspired pseudo random number generator +// http://www.umbc.edu/~olano/papers/mNoise.pdf +// real BBS uses ((s*s) mod M) with bignums and M as the product of two huge Blum primes +// instead, we use a single prime M just small enough not to overflow +// note that the above paper used 61, which fits in a half, but is unusably bad +// @param Integer valued floating point seed +// @return random number in range [0,1) +// ~8 ALU operations (5 *, 3 frac) +float RandBBSfloat(float seed) +{ + float BBS_PRIME24 = 4093.0; + float s = math::frac(seed / BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + s = math::frac(s * s * BBS_PRIME24); + return s; +} + +// Modified noise gradient term +// @param seed - random seed for integer lattice position +// @param offset - [-1,1] offset of evaluation point from lattice point +// @return gradient direction (xyz) and contribution (w) from this lattice point +float4 MGradient(int seed, float3 offset) +{ + //TODO uint + int rand = Rand3DPCG16(int3(seed,0,0)).x; + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1.0 / 0x4000, 1.0 / 0x2000, 1.0 / 0x1000); + float3 direction = float3(int3(rand, rand, rand) & MGradientMask) * MGradientScale - 1; + return float4(direction.x, direction.y, direction.z, math::dot(direction, offset)); +} + +// compute Perlin and related noise corner seed values +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = true to return seed values for a repeating noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @param seed000-seed111 = hash function seeds for the eight corners +// @return fractional part of v +struct SeedValue +{ + float3 fv = float3(0); + float seed000 = 0; + float seed001 = 0; + float seed010 = 0; + float seed011 = 0; + float seed100 = 0; + float seed101 = 0; + float seed110 = 0; + float seed111 = 0; +}; + +SeedValue NoiseSeeds(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds; + seeds.fv = math::frac(v); + float3 iv = math::floor(v); + + const float3 primes = float3(19, 47, 101); + + if (bTiling) + { // can't algebraically combine with primes + seeds.seed000 = math::dot(primes, NoiseTileWrap(iv, true, RepeatSize)); + seeds.seed100 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 0), true, RepeatSize)); + seeds.seed010 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 0), true, RepeatSize)); + seeds.seed110 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 0), true, RepeatSize)); + seeds.seed001 = math::dot(primes, NoiseTileWrap(iv + float3(0, 0, 1), true, RepeatSize)); + seeds.seed101 = math::dot(primes, NoiseTileWrap(iv + float3(1, 0, 1), true, RepeatSize)); + seeds.seed011 = math::dot(primes, NoiseTileWrap(iv + float3(0, 1, 1), true, RepeatSize)); + seeds.seed111 = math::dot(primes, NoiseTileWrap(iv + float3(1, 1, 1), true, RepeatSize)); + } + else + { // get to combine offsets with multiplication by primes in this case + seeds.seed000 = math::dot(iv, primes); + seeds.seed100 = seeds.seed000 + primes.x; + seeds.seed010 = seeds.seed000 + primes.y; + seeds.seed110 = seeds.seed100 + primes.y; + seeds.seed001 = seeds.seed000 + primes.z; + seeds.seed101 = seeds.seed100 + primes.z; + seeds.seed011 = seeds.seed010 + primes.z; + seeds.seed111 = seeds.seed110 + primes.z; + } + + return seeds; +} + +struct SimplexWeights +{ + float4 Result = float4(0); + float3 PosA = float3(0); + float3 PosB = float3(0); + float3 PosC = float3(0); + float3 PosD = float3(0); +}; + +// Computed weights and sample positions for simplex interpolation +// @return float4(a,b,c, d) Barycentric coordinate defined as Filtered = Tex(PosA) * a + Tex(PosB) * b + Tex(PosC) * c + Tex(PosD) * d +SimplexWeights ComputeSimplexWeights3D(float3 OrthogonalPos) +{ + SimplexWeights weights; + float3 OrthogonalPosFloor = math::floor(OrthogonalPos); + + weights.PosA = OrthogonalPosFloor; + weights.PosB = weights.PosA + float3(1, 1, 1); + + OrthogonalPos -= OrthogonalPosFloor; + + float Largest = math::max(OrthogonalPos.x, math::max(OrthogonalPos.y, OrthogonalPos.z)); + float Smallest = math::min(OrthogonalPos.x, math::min(OrthogonalPos.y, OrthogonalPos.z)); + + weights.PosC = weights.PosA + float3(Largest == OrthogonalPos.x, Largest == OrthogonalPos.y, Largest == OrthogonalPos.z); + weights.PosD = weights.PosA + float3(Smallest != OrthogonalPos.x, Smallest != OrthogonalPos.y, Smallest != OrthogonalPos.z); + + float RG = OrthogonalPos.x - OrthogonalPos.y; + float RB = OrthogonalPos.x - OrthogonalPos.z; + float GB = OrthogonalPos.y - OrthogonalPos.z; + + weights.Result.z = + math::min(math::max(0, RG), math::max(0, RB)) // X + + math::min(math::max(0, -RG), math::max(0, GB)) // Y + + math::min(math::max(0, -RB), math::max(0, -GB)); // Z + + weights.Result.w = + math::min(math::max(0, -RG), math::max(0, -RB)) // X + + math::min(math::max(0, RG), math::max(0, -GB)) // Y + + math::min(math::max(0, RB), math::max(0, GB)); // Z + + weights.Result.y = Smallest; + weights.Result.x = 1.0f - weights.Result.y - weights.Result.z - weights.Result.w; + + return weights; +} + +// filtered 3D gradient simple noise (few texture lookups, high quality) +// @param v >0 +// @return random number in the range -1 .. 1 +float SimplexNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 EvalPos) +{ + float3 OrthogonalPos = SkewSimplex(EvalPos); + + SimplexWeights Weights = ComputeSimplexWeights3D(OrthogonalPos); + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 32 bit) + float3 A = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosA); + float3 B = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosB); + float3 C = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosC); + float3 D = GetPerlinNoiseGradientTextureAt(PerlinNoiseGradientTexture, Weights.PosD); + + Weights.PosA = UnSkewSimplex(Weights.PosA); + Weights.PosB = UnSkewSimplex(Weights.PosB); + Weights.PosC = UnSkewSimplex(Weights.PosC); + Weights.PosD = UnSkewSimplex(Weights.PosD); + + float DistanceWeight; + + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosA)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float a = math::dot(A, EvalPos - Weights.PosA) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosB)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float b = math::dot(B, EvalPos - Weights.PosB) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosC)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float c = math::dot(C, EvalPos - Weights.PosC) * DistanceWeight; + DistanceWeight = math::saturate(0.6f - length2(EvalPos - Weights.PosD)); DistanceWeight *= DistanceWeight; DistanceWeight *= DistanceWeight; + float d = math::dot(D, EvalPos - Weights.PosD) * DistanceWeight; + + return 32 * (a + b + c + d); +} + +// filtered 3D noise, can be optimized +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_TEX(uniform texture_2d PerlinNoiseGradientTexture, float3 v, bool bTiling, float RepeatSize) +{ + bTiling = true; + float3 fv = math::frac(v); + float3 iv0 = NoiseTileWrap(math::floor(v), bTiling, RepeatSize); + float3 iv1 = NoiseTileWrap(iv0 + 1, bTiling, RepeatSize); + + const int2 ZShear = int2(17, 89); + + float2 OffsetA = iv0.z * ZShear; + float2 OffsetB = OffsetA + ZShear; // non-tiling, use relative offset + if (bTiling) // tiling, have to compute from wrapped coordinates + { + OffsetB = iv1.z * ZShear; + } + + // Texture size scale factor + float ts = 1 / 128.0f; + + // texture coordinates for iv0.xy, as offset for both z slices + float2 TexA0 = (float2(iv0.x, iv0.y) + OffsetA + 0.5f) * ts; + float2 TexB0 = (float2(iv0.x, iv0.y) + OffsetB + 0.5f) * ts; + + // texture coordinates for iv1.xy, as offset for both z slices + float2 TexA1 = TexA0 + ts; // for non-tiling, can compute relative to existing coordinates + float2 TexB1 = TexB0 + ts; + if (bTiling) // for tiling, need to compute from wrapped coordinates + { + TexA1 = (float2(iv1.x, iv1.y) + OffsetA + 0.5f) * ts; + TexB1 = (float2(iv1.x, iv1.y) + OffsetB + 0.5f) * ts; + } + + + // can be optimized to 1 or 2 texture lookups (4 or 8 channel encoded in 8, 16 or 32 bit) + float4 PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + float3 PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 A = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 B = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA0.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 C = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexA1.x,1.0-TexA1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 D = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 E = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB0.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 F = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB0.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 G = PerlinNoiseColor * 2 - 1; + PerlinNoise = tex::lookup_float4(PerlinNoiseGradientTexture,float2(TexB1.x,1.0-TexB1.y),tex::wrap_repeat,tex::wrap_repeat); + PerlinNoiseColor = float3(PerlinNoise.x, PerlinNoise.y, PerlinNoise.z); + float3 H = PerlinNoiseColor * 2 - 1; + + float a = math::dot(A, fv - float3(0, 0, 0)); + float b = math::dot(B, fv - float3(1, 0, 0)); + float c = math::dot(C, fv - float3(0, 1, 0)); + float d = math::dot(D, fv - float3(1, 1, 0)); + float e = math::dot(E, fv - float3(0, 0, 1)); + float f = math::dot(F, fv - float3(1, 0, 1)); + float g = math::dot(G, fv - float3(0, 1, 1)); + float h = math::dot(H, fv - float3(1, 1, 1)); + + float4 Weights = PerlinRamp(math::frac(float4(fv.x, fv.y, fv.z, 0))); + + float i = math::lerp(math::lerp(a, b, Weights.x), math::lerp(c, d, Weights.x), Weights.y); + float j = math::lerp(math::lerp(e, f, Weights.x), math::lerp(g, h, Weights.x), Weights.y); + + return math::lerp(i, j, Weights.z); +} + +// @return random number in the range -1 .. 1 +// scalar: 6 frac, 31 mul/mad, 15 add, +float FastGradientPerlinNoise3D_TEX(uniform texture_3d PerlinNoise3DTexture, float3 xyz) +{ + // needs to be the same value when creating the PerlinNoise3D texture + float Extent = 16; + + // last texel replicated and needed for filtering + // scalar: 3 frac, 6 mul + xyz = math::frac(xyz / (Extent - 1)) * (Extent - 1); + + // scalar: 3 frac + float3 uvw = math::frac(xyz); + // = floor(xyz); + // scalar: 3 add + float3 p0 = xyz - uvw; +// float3 f = math::pow(uvw, 2) * 3.0f - math::pow(uvw, 3) * 2.0f; // original perlin hermite (ok when used without bump mapping) + // scalar: 2*3 add 5*3 mul + float4 pr = PerlinRamp(float4(uvw.x, uvw.y, uvw.z, 0)); + float3 f = float3(pr.x, pr.y, pr.z); // new, better with continues second derivative for bump mapping + // scalar: 3 add + float3 p = p0 + f; + // scalar: 3 mad + // TODO: need reverse??? + float4 NoiseSample = tex::lookup_float4(PerlinNoise3DTexture, p / Extent + 0.5f / Extent); // +0.5f to get rid of bilinear offset + + // reconstruct from 8bit (using mad with 2 constants and dot4 was same instruction count) + // scalar: 4 mad, 3 mul, 3 add + float3 n = float3(NoiseSample.x, NoiseSample.y, NoiseSample.z) * 255.0f / 127.0f - 1.0f; + float d = NoiseSample.w * 255.f - 127; + return math::dot(xyz, n) - d; +} + +// Perlin-style "Modified Noise" +// http://www.umbc.edu/~olano/papers/index.html#mNoise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float GradientNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = MGradient(int(seeds.seed000), seeds.fv - float3(0, 0, 0)).w; + float rand100 = MGradient(int(seeds.seed100), seeds.fv - float3(1, 0, 0)).w; + float rand010 = MGradient(int(seeds.seed010), seeds.fv - float3(0, 1, 0)).w; + float rand110 = MGradient(int(seeds.seed110), seeds.fv - float3(1, 1, 0)).w; + float rand001 = MGradient(int(seeds.seed001), seeds.fv - float3(0, 0, 1)).w; + float rand101 = MGradient(int(seeds.seed101), seeds.fv - float3(1, 0, 1)).w; + float rand011 = MGradient(int(seeds.seed011), seeds.fv - float3(0, 1, 1)).w; + float rand111 = MGradient(int(seeds.seed111), seeds.fv - float3(1, 1, 1)).w; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D value noise - used to be incorrectly called Perlin noise +// @param v = 3D noise argument, use float3(x,y,0) for 2D or float3(x,0,0) for 1D +// @param bTiling = repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension +// @return random number in the range -1 .. 1 +float ValueNoise3D_ALU(float3 v, bool bTiling, float RepeatSize) +{ + SeedValue seeds = NoiseSeeds(v, bTiling, RepeatSize); + + float rand000 = RandBBSfloat(seeds.seed000) * 2 - 1; + float rand100 = RandBBSfloat(seeds.seed100) * 2 - 1; + float rand010 = RandBBSfloat(seeds.seed010) * 2 - 1; + float rand110 = RandBBSfloat(seeds.seed110) * 2 - 1; + float rand001 = RandBBSfloat(seeds.seed001) * 2 - 1; + float rand101 = RandBBSfloat(seeds.seed101) * 2 - 1; + float rand011 = RandBBSfloat(seeds.seed011) * 2 - 1; + float rand111 = RandBBSfloat(seeds.seed111) * 2 - 1; + + float4 Weights = PerlinRamp(float4(seeds.fv.x, seeds.fv.y, seeds.fv.z, 0)); + + float i = math::lerp(math::lerp(rand000, rand100, Weights.x), math::lerp(rand010, rand110, Weights.x), Weights.y); + float j = math::lerp(math::lerp(rand001, rand101, Weights.x), math::lerp(rand011, rand111, Weights.x), Weights.y); + return math::lerp(i, j, Weights.z); +} + +// 3D jitter offset within a voronoi noise cell +// @param pos - integer lattice corner +// @return random offsets vector +float3 VoronoiCornerSample(float3 pos, int Quality) +{ + // random values in [-0.5, 0.5] + float3 noise = float3(Rand3DPCG16(int3(pos))) / 0xffff - 0.5; + + // quality level 1 or 2: searches a 2x2x2 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 2x2x2 search + if (Quality <= 2) + { + return math::normalize(noise) * 0.2588; + } + + // quality level 3: searches a 3x3x3 neighborhood with points distributed on a sphere + // scale factor to guarantee jittered points will be found within a 3x3x3 search + if (Quality == 3) + { + return math::normalize(noise) * 0.3090; + } + + // quality level 4: jitter to anywhere in the cell, needs 4x4x4 search + return noise; +} + +// compare previous best with a new candidate +// not producing point locations makes it easier for compiler to eliminate calculations when they're not needed +// @param minval = location and distance of best candidate seed point before the new one +// @param candidate = candidate seed point +// @param offset = 3D offset to new candidate seed point +// @param bDistanceOnly = if true, only set maxval.w with distance, otherwise maxval.w is distance and maxval.xyz is position +// @return position (if bDistanceOnly is false) and distance to closest seed point so far +float4 VoronoiCompare(float4 minval, float3 candidate, float3 offset, bool bDistanceOnly) +{ + if (bDistanceOnly) + { + return float4(0, 0, 0, math::min(minval.w, math::dot(offset, offset))); + } + else + { + float newdist = math::dot(offset, offset); + return newdist > minval.w ? minval : float4(candidate.x, candidate.y, candidate.z, newdist); + } +} + +// 220 instruction Worley noise +float4 VoronoiNoise3D_ALU(float3 v, int Quality, bool bTiling, float RepeatSize, bool bDistanceOnly) +{ + float3 fv = math::frac(v), fv2 = math::frac(v + 0.5); + float3 iv = math::floor(v), iv2 = math::floor(v + 0.5); + + // with initial minimum distance = infinity (or at least bigger than 4), first min is optimized away + float4 mindist = float4(0,0,0,100); + float3 p, offset; + + // quality level 3: do a 3x3x3 search + if (Quality == 3) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 1; ++offset_x) + { + for (offset_y = -1; offset_y <= 1; ++offset_y) + { + for (offset_z = -1; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + + // everybody else searches a base 2x2x2 neighborhood + else + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = 0; offset_x <= 1; ++offset_x) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // quality level 2, do extra set of points, offset by half a cell + if (Quality == 2) + { + // 467 is just an offset to a different area in the random number field to avoid similar neighbor artifacts + p = offset + VoronoiCornerSample(NoiseTileWrap(iv2 + offset, bTiling, RepeatSize) + 467, Quality); + mindist = VoronoiCompare(mindist, iv2 + p, fv2 - p, bDistanceOnly); + } + } + } + } + } + + // quality level 4: add extra sets of four cells in each direction + if (Quality >= 4) + { + int offset_x; + int offset_y; + int offset_z; + for (offset_x = -1; offset_x <= 2; offset_x += 3) + { + for (offset_y = 0; offset_y <= 1; ++offset_y) + { + for (offset_z = 0; offset_z <= 1; ++offset_z) + { + offset = float3(offset_x, offset_y, offset_z); + // along x axis + p = offset + VoronoiCornerSample(NoiseTileWrap(iv + offset, bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along y axis + p = float3(offset.y, offset.z, offset.x) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.y, offset.z, offset.x), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + + // along z axis + p = float3(offset.z, offset.x, offset.y) + VoronoiCornerSample(NoiseTileWrap(iv + float3(offset.z, offset.x, offset.y), bTiling, RepeatSize), Quality); + mindist = VoronoiCompare(mindist, iv + p, fv - p, bDistanceOnly); + } + } + } + } + + // transform squared distance to real distance + return float4(mindist.x, mindist.y, mindist.z, math::sqrt(mindist.w)); +} + +// Coordinates for corners of a Simplex tetrahedron +// Based on McEwan et al., Efficient computation of noise in GLSL, JGT 2011 +// @param v = 3D noise argument +// @return 4 corner locations +float4x3 SimplexCorners(float3 v) +{ + // find base corner by skewing to tetrahedral space and back + float3 tet = math::floor(v + v.x/3 + v.y/3 + v.z/3); + float3 base = tet - tet.x/6 - tet.y/6 - tet.z/6; + float3 f = v - base; + + // Find offsets to other corners (McEwan did this in tetrahedral space, + // but since skew is along x=y=z axis, this works in Euclidean space too.) + float3 g = math::step(float3(f.y,f.z,f.x), float3(f.x,f.y,f.z)), h = 1 - float3(g.z, g.x, g.y); + float3 a1 = math::min(g, h) - 1.0 / 6.0, a2 = math::max(g, h) - 1.0 / 3.0; + + // four corners + return float4x3(base, base + a1, base + a2, base + 0.5); +} + +// Improved smoothing function for simplex noise +// @param f = fractional distance to four tetrahedral corners +// @return weight for each corner +float4 SimplexSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + return (1 * scale + s*(-3 * scale + s*(3 * scale - s*scale))); +} + +// Derivative of simplex noise smoothing function +// @param f = fractional distanc eto four tetrahedral corners +// @return derivative of smoothing function for each corner by x, y and z +float3x4 SimplexDSmooth(float4x3 f) +{ + const float scale = 1024. / 375.; // scale factor to make noise -1..1 + float4 d = float4(math::dot(f[0], f[0]), math::dot(f[1], f[1]), math::dot(f[2], f[2]), math::dot(f[3], f[3])); + float4 s = math::saturate(2 * d); + s = -12 * scale + s*(24 * scale - s * 12 * scale); + + return float3x4( + s * float4(f[0][0], f[1][0], f[2][0], f[3][0]), + s * float4(f[0][1], f[1][1], f[2][1], f[3][1]), + s * float4(f[0][2], f[1][2], f[2][2], f[3][2])); +} + +// Simplex noise and its Jacobian derivative +// @param v = 3D noise argument +// @param bTiling = whether to repeat noise pattern +// @param RepeatSize = integer units before tiling in each dimension, must be a multiple of 3 +// @return float3x3 Jacobian in J[*].xyz, vector noise in J[*].w +// J[0].w, J[1].w, J[2].w is a Perlin-style simplex noise with vector output, e.g. (Nx, Ny, Nz) +// J[i].x is X derivative of the i'th component of the noise so J[2].x is dNz/dx +// You can use this to compute the noise, gradient, curl, or divergence: +// float3x4 J = JacobianSimplex_ALU(...); +// float3 VNoise = float3(J[0].w, J[1].w, J[2].w); // 3D noise +// float3 Grad = J[0].xyz; // gradient of J[0].w +// float3 Curl = float3(J[1][2]-J[2][1], J[2][0]-J[0][2], J[0][1]-J[1][2]); +// float Div = J[0][0]+J[1][1]+J[2][2]; +// All of these are confirmed to compile out all unneeded terms. +// So Grad of X doesn't compute Y or Z components, and VNoise doesn't do any of the derivative computation. +float3x4 JacobianSimplex_ALU(float3 v, bool bTiling, float RepeatSize) +{ + int3 MGradientMask = int3(0x8000, 0x4000, 0x2000); + float3 MGradientScale = float3(1. / 0x4000, 1. / 0x2000, 1. / 0x1000); + + // corners of tetrahedron + float4x3 T = SimplexCorners(v); + // TODO: uint3 + int3 rand = int3(0); + float4x3 gvec0 = float4x3(1.0); + float4x3 gvec1 = float4x3(1.0); + float4x3 gvec2 = float4x3(1.0); + float4x3 fv = float4x3(1.0); + float3x4 grad = float3x4(1.0); + + // processing of tetrahedral vertices, unrolled + // to compute gradient at each corner + fv[0] = v - T[0]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[0] + 0.5, bTiling, RepeatSize)))); + gvec0[0] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[0] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[0] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][0] = math::dot(gvec0[0], fv[0]); + grad[1][0] = math::dot(gvec1[0], fv[0]); + grad[2][0] = math::dot(gvec2[0], fv[0]); + + fv[1] = v - T[1]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[1] + 0.5, bTiling, RepeatSize)))); + gvec0[1] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec1[1] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][1] = math::dot(gvec0[1], fv[1]); + grad[1][1] = math::dot(gvec1[1], fv[1]); + grad[2][1] = math::dot(gvec2[1], fv[1]); + + fv[2] = v - T[2]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[2] + 0.5, bTiling, RepeatSize)))); + gvec0[2] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[2] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[2] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][2] = math::dot(gvec0[2], fv[2]); + grad[1][2] = math::dot(gvec1[2], fv[2]); + grad[2][2] = math::dot(gvec2[2], fv[2]); + + fv[3] = v - T[3]; + rand = Rand3DPCG16(int3(math::floor(NoiseTileWrap(6 * T[3] + 0.5, bTiling, RepeatSize)))); + gvec0[3] = float3(int3(rand.x,rand.x,rand.x) & MGradientMask) * MGradientScale - 1; + gvec1[3] = float3(int3(rand.y,rand.y,rand.y) & MGradientMask) * MGradientScale - 1; + gvec2[3] = float3(int3(rand.z,rand.z,rand.z) & MGradientMask) * MGradientScale - 1; + grad[0][3] = math::dot(gvec0[3], fv[3]); + grad[1][3] = math::dot(gvec1[3], fv[3]); + grad[2][3] = math::dot(gvec2[3], fv[3]); + + // blend gradients + float4 sv = SimplexSmooth(fv); + float3x4 ds = SimplexDSmooth(fv); + + float3x4 jacobian = float3x4(1.0); + float3 vec0 = gvec0*sv + grad[0]*ds; // NOTE: mdl is column major, convert from UE4 (row major) + jacobian[0] = float4(vec0.x, vec0.y, vec0.z, math::dot(sv, grad[0])); + float3 vec1 = gvec1*sv + grad[1]*ds; + jacobian[1] = float4(vec1.x, vec1.y, vec1.z, math::dot(sv, grad[1])); + float3 vec2 = gvec2*sv + grad[2]*ds; + jacobian[2] = float4(vec2.x, vec2.y, vec2.z, math::dot(sv, grad[2])); + + return jacobian; +} + +// While RepeatSize is a float here, the expectation is that it would be largely integer values coming in from the UI. The downstream logic assumes +// floats for all called functions (NoiseTileWrap) and this prevents any float-to-int conversion errors from automatic type conversion. +float Noise3D_Multiplexer(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, int Function, float3 Position, int Quality, bool bTiling, float RepeatSize) +{ + // verified, HLSL compiled out the switch if Function is a constant + switch(Function) + { + case 0: + return SimplexNoise3D_TEX(PerlinNoiseGradientTexture, Position); + case 1: + return GradientNoise3D_TEX(PerlinNoiseGradientTexture, Position, bTiling, RepeatSize); + case 2: + return FastGradientPerlinNoise3D_TEX(PerlinNoise3DTexture, Position); + case 3: + return GradientNoise3D_ALU(Position, bTiling, RepeatSize); + case 4: + return ValueNoise3D_ALU(Position, bTiling, RepeatSize); + case 5: + return VoronoiNoise3D_ALU(Position, Quality, bTiling, RepeatSize, true).w * 2.0 - 1.0; + } + return 0; +} +//---------------------------------------------------------- + +export float noise(uniform texture_2d PerlinNoiseGradientTexture, uniform texture_3d PerlinNoise3DTexture, float3 Position, float Scale, float Quality, float Function, float Turbulence, float Levels, float OutputMin, float OutputMax, float LevelScale, float FilterWidth, float Tiling, float RepeatSize) +[[ + anno::description("Noise"), + anno::noinline() +]] +{ + Position *= Scale; + FilterWidth *= Scale; + + float Out = 0.0f; + float OutScale = 1.0f; + float InvLevelScale = 1.0f / LevelScale; + + int iFunction(Function); + int iQuality(Quality); + int iLevels(Levels); + bool bTurbulence(Turbulence); + bool bTiling(Tiling); + + for(int i = 0; i < iLevels; ++i) + { + // fade out noise level that are too high frequent (not done through dynamic branching as it usually requires gradient instructions) + OutScale *= math::saturate(1.0 - FilterWidth); + + if(bTurbulence) + { + Out += math::abs(Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize)) * OutScale; + } + else + { + Out += Noise3D_Multiplexer(PerlinNoiseGradientTexture, PerlinNoise3DTexture, iFunction, Position, iQuality, bTiling, RepeatSize) * OutScale; + } + + Position *= LevelScale; + RepeatSize *= LevelScale; + OutScale *= InvLevelScale; + FilterWidth *= LevelScale; + } + + if(!bTurbulence) + { + // bring -1..1 to 0..1 range + Out = Out * 0.5f + 0.5f; + } + + // Out is in 0..1 range + return math::lerp(OutputMin, OutputMax, Out); +} + +// Material node for noise functions returning a vector value +// @param LevelScale usually 2 but higher values allow efficient use of few levels +// @return in user defined range (OutputMin..OutputMax) +export float4 vector4_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise"), + anno::noinline() +]] +{ + float4 result = float4(0,0,0,1); + float3 ret = float3(0); + int iQuality = int(Quality); + int iFunction = int(Function); + bool bTiling = Tiling > 0.0; + + float3x4 Jacobian = JacobianSimplex_ALU(Position, bTiling, TileSize); // compiled out if not used + + // verified, HLSL compiled out the switch if Function is a constant + switch (iFunction) + { + case 0: // Cellnoise + ret = float3(Rand3DPCG16(int3(math::floor(NoiseTileWrap(Position, bTiling, TileSize))))) / 0xffff; + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 1: // Color noise + ret = float3(Jacobian[0].w, Jacobian[1].w, Jacobian[2].w); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 2: // Gradient + result = Jacobian[0]; + break; + case 3: // Curl + ret = float3(Jacobian[2][1] - Jacobian[1][2], Jacobian[0][2] - Jacobian[2][0], Jacobian[1][0] - Jacobian[0][1]); + result = float4(ret.x, ret.y, ret.z, 1); + break; + case 4: // Voronoi + result = VoronoiNoise3D_ALU(Position, iQuality, bTiling, TileSize, false); + break; + } + return result; +} + +export float3 vector3_noise(float3 Position, float Quality, float Function, float Tiling, float TileSize) +[[ + anno::description("Vector Noise float3 version"), + anno::noinline() +]] +{ + float4 noise = vector4_noise(Position, Quality, Function, Tiling, TileSize); + return float3(noise.x, noise.y, noise.z); +} + + +// workaround for ue4 fresnel (without supporting for camera vector) : replacing it with 0.0, means facing to the view +export float fresnel(float exponent [[anno::unused()]], float base_reflect_fraction [[anno::unused()]], float3 normal [[anno::unused()]]) +[[ + anno::description("Fresnel"), + anno::noinline() +]] +{ + return 0.0; +} + +export float fresnel_function(float3 normal_vector [[anno::unused()]], float3 camera_vector [[anno::unused()]], + bool invert_fresnel [[anno::unused()]], float power [[anno::unused()]], + bool use_cheap_contrast [[anno::unused()]], float cheap_contrast_dark [[anno::unused()]], float cheap_contrast_bright [[anno::unused()]], + bool clamp_fresnel_dot_product [[anno::unused()]]) +[[ + anno::description("Fresnel Function"), + anno::noinline() +]] +{ + return 0.0; +} + +export float3 camera_vector(uniform bool up_z = true) +[[ + anno::description("Camera Vector"), + anno::noinline() +]] +{ + // assume camera postion is 0,0,0 + return math::normalize(float3(0) - convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)); +} + +export float pixel_depth() +[[ + anno::description("Pixel Depth"), + anno::noinline() +]] +{ + return 256.0f; +} + +export float scene_depth() +[[ + anno::description("Scene Depth") +]] +{ + return 65500.0f; +} + +export float3 scene_color() +[[ + anno::description("Scene Color") +]] +{ + return float3(1.0f); +} + +export float4 vertex_color() +[[ + anno::description("Vertex Color"), + anno::noinline() +]] +{ + return float4(1.0f); +} + +export float4 vertex_color_from_coordinate(int VertexColorCoordinateIndex) +[[ + anno::description("Vertex Color for float2 PrimVar"), + anno::noinline() +]] +{ + // Kit only supports 4 uv sets, 2 uvs are available to vertex color. if vertex color index is invalid, output the constant WHITE color intead + return (VertexColorCoordinateIndex > 2) ? float4(1.0f) : float4(state::texture_coordinate(VertexColorCoordinateIndex).x, state::texture_coordinate(VertexColorCoordinateIndex).y, state::texture_coordinate(VertexColorCoordinateIndex+1).x, state::texture_coordinate(VertexColorCoordinateIndex+1).y); +} + +export float3 camera_position() +[[ + anno::description("Camera Position"), + anno::noinline() +]] +{ + return float3(1000.0f, 0, 0); +} + +export float3 rotate_about_axis(float4 NormalizedRotationAxisAndAngle, float3 PositionOnAxis, float3 Position) +[[ + anno::description("Rotates Position about the given axis by the given angle") +]] +{ + // Project Position onto the rotation axis and find the closest point on the axis to Position + float3 NormalizedRotationAxis = float3(NormalizedRotationAxisAndAngle.x,NormalizedRotationAxisAndAngle.y,NormalizedRotationAxisAndAngle.z); + float3 ClosestPointOnAxis = PositionOnAxis + NormalizedRotationAxis * math::dot(NormalizedRotationAxis, Position - PositionOnAxis); + // Construct orthogonal axes in the plane of the rotation + float3 UAxis = Position - ClosestPointOnAxis; + float3 VAxis = math::cross(NormalizedRotationAxis, UAxis); + float[2] SinCosAngle = math::sincos(NormalizedRotationAxisAndAngle.w); + // Rotate using the orthogonal axes + float3 R = UAxis * SinCosAngle[1] + VAxis * SinCosAngle[0]; + // Reconstruct the rotated world space position + float3 RotatedPosition = ClosestPointOnAxis + R; + // Convert from position to a position offset + return RotatedPosition - Position; +} + +export float2 rotate_scale_offset_texcoords(float2 InTexCoords, float4 InRotationScale, float2 InOffset) +[[ + anno::description("Returns a float2 texture coordinate after 2x2 transform and offset applied") +]] +{ + return float2(math::dot(InTexCoords, float2(InRotationScale.x, InRotationScale.y)), math::dot(InTexCoords, float2(InRotationScale.z, InRotationScale.w))) + InOffset; +} + +export float3 reflection_custom_world_normal(float3 WorldNormal, bool bNormalizeInputNormal, uniform bool up_z = true) +[[ + anno::description("Reflection vector about the specified world space normal") +]] +{ + if (bNormalizeInputNormal) + { + WorldNormal = math::normalize(WorldNormal); + } + + return -camera_vector(up_z) + WorldNormal * math::dot(WorldNormal, camera_vector(up_z)) * 2.0; +} + +export float3 reflection_vector(uniform bool up_z = true) +[[ + anno::description("Reflection Vector"), + anno::noinline() +]] +{ + float3 normal = convert_to_left_hand(state::transform_normal(state::coordinate_internal,state::coordinate_world,state::normal()), up_z, false); + return reflection_custom_world_normal(normal, false, up_z); +} + +export float dither_temporalAA(float AlphaThreshold = 0.5f, float Random = 1.0f [[anno::unused()]]) +[[ + anno::description("Dither TemporalAA"), + anno::noinline() +]] +{ + return AlphaThreshold; +} + +export float3 black_body( float Temp ) +[[ + anno::description("Black Body"), + anno::noinline() +]] +{ + float u = ( 0.860117757f + 1.54118254e-4f * Temp + 1.28641212e-7f * Temp*Temp ) / ( 1.0f + 8.42420235e-4f * Temp + 7.08145163e-7f * Temp*Temp ); + float v = ( 0.317398726f + 4.22806245e-5f * Temp + 4.20481691e-8f * Temp*Temp ) / ( 1.0f - 2.89741816e-5f * Temp + 1.61456053e-7f * Temp*Temp ); + + float x = 3*u / ( 2*u - 8*v + 4 ); + float y = 2*v / ( 2*u - 8*v + 4 ); + float z = 1 - x - y; + + float Y = 1; + float X = Y/y * x; + float Z = Y/y * z; + + float3x3 XYZtoRGB = float3x3( + float3(3.2404542, -1.5371385, -0.4985314), + float3(-0.9692660, 1.8760108, 0.0415560), + float3(0.0556434, -0.2040259, 1.0572252) + ); + + return XYZtoRGB * float3( X, Y, Z ) * math::pow( 0.0004 * Temp, 4 ); +} + +export float per_instance_random(uniform texture_2d PerlinNoiseGradientTexture, int NumberInstances) +[[ + anno::description("Per Instance Random"), + anno::noinline() +]] +{ + float weight = state::object_id() / float(NumberInstances); + return NumberInstances == 0 ? 0.0 : tex::lookup_float4(PerlinNoiseGradientTexture, float2(weight, 1.0 - weight), tex::wrap_repeat, tex::wrap_repeat).x; +} + +//------------------ Hair from UE4 ----------------------- +float3 hair_absorption_to_color(float3 A) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::exp(-math::sqrt(A) * D); +} + +float3 hair_color_to_absorption(float3 C) +{ + const float B = 0.3f; + float b2 = B * B; + float b3 = B * b2; + float b4 = b2 * b2; + float b5 = B * b4; + float D = (5.969f - 0.215f * B + 2.532f * b2 - 10.73f * b3 + 5.574f * b4 + 0.245f * b5); + return math::pow(math::log(C) / D, 2.0f); +} + +export float3 get_hair_color_from_melanin(float InMelanin, float InRedness, float3 InDyeColor) +[[ + anno::description("Hair Color") +]] +{ + InMelanin = math::saturate(InMelanin); + InRedness = math::saturate(InRedness); + float Melanin = -math::log(math::max(1 - InMelanin, 0.0001f)); + float Eumelanin = Melanin * (1 - InRedness); + float Pheomelanin = Melanin * InRedness; + + float3 DyeAbsorption = hair_color_to_absorption(math::saturate(InDyeColor)); + float3 Absorption = Eumelanin * float3(0.506f, 0.841f, 1.653f) + Pheomelanin * float3(0.343f, 0.733f, 1.924f); + + return hair_absorption_to_color(Absorption + DyeAbsorption); +} + +export float3 local_object_bounds_min() +[[ + anno::description("Local Object Bounds Min"), + anno::noinline() +]] +{ + return float3(0.0); +} + +export float3 local_object_bounds_max() +[[ + anno::description("Local Object Bounds Max"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float3 object_bounds() +[[ + anno::description("Object Bounds"), + anno::noinline() +]] +{ + return float3(100.0); +} + +export float object_radius() +[[ + anno::description("Object Radius"), + anno::noinline() +]] +{ + return 100.0f; +} + +export float3 object_world_position(uniform bool up_z = true) +[[ + anno::description("Object World Position"), + anno::noinline() +]] +{ + return convert_to_left_hand(state::transform_point(state::coordinate_internal,state::coordinate_world,state::position()), up_z)*state::meters_per_scene_unit()*100.0; +} + +export float3 object_orientation() +[[ + anno::description("Object Orientation"), + anno::noinline() +]] +{ + return float3(0); +} + +export float rcp(float x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float2 rcp(float2 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float3 rcp(float3 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export float4 rcp(float4 x) +[[ + anno::description("hlsl rcp"), + anno::noinline() +]] +{ + return 1.0f / x; +} + +export int BitFieldExtractI32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractI32 int"), + anno::noinline() +]] +{ + Size &= 3; + Offset &= 3; + + if (Size == 0) + return 0; + else if (Offset + Size < 32) + return (Data << (32 - Size - Offset)) >> (32 - Size); + else + return Data >> Offset; +} + +export int BitFieldExtractI32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractI32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(int(Data), int(Size), int(Offset)); +} + +export int BitFieldExtractU32(float Data, float Size, float Offset) +[[ + anno::description("BitFieldExtractU32 float"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export int BitFieldExtractU32(int Data, int Size, int Offset) +[[ + anno::description("BitFieldExtractU32 int"), + anno::noinline() +]] +{ + return BitFieldExtractI32(Data, Size, Offset); +} + +export float3 EyeAdaptationInverseLookup(float3 LightValue, float Alpha) +[[ + anno::description("EyeAdaptationInverseLookup"), + anno::noinline() +]] +{ + float Adaptation = 1.0f; + + // When Alpha=0.0, we want to multiply by 1.0. when Alpha = 1.0, we want to multiply by 1/Adaptation. + // So the lerped value is: + // LerpLogScale = Lerp(log(1),log(1/Adaptaiton),T) + // Which is simplified as: + // LerpLogScale = Lerp(0,-log(Adaptation),T) + // LerpLogScale = -T * logAdaptation; + + float LerpLogScale = -Alpha * math::log(Adaptation); + float Scale = math::exp(LerpLogScale); + return LightValue * Scale; +}